Amazon glass container with lid

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The 10 Best Glass Food Storage Containers in

Frego Plastic-Free Glass and Silicone Food Containers
What We Like
  • Includes removable silicone sleeves

  • Dual-lock silicone lids offer tight seal

  • Oven-, microwave-, and dishwasher-safe

What We Don't Like
  • Containers have shallow depth

Glass is the perfect non-staining, odor-resistant material for containers, but the downside is that glass can break if it’s bumped hard or dropped. These handy 2-cup containers help to solve that problem since they’ve covered with a silicone sleeve that cushions and insulates the container for safer storage. Meanwhile, the dual-lock lids seal tight, keeping food fresh, whether it’s leftover gravy, a sandwich for lunch at work, or onions that were prepped ahead of time for taco night.

Though an undeniable benefit, our tester found a drawback: Because there’s some space between the glass and the silicone sleeve, these are not satisfactory containers for transporting liquids since food can get stuck between the two layers. It also takes some muscle to get the entire silicon lid to snap down into the silicone sleeve.

The containers are oven- and microwave-safe for easy cooking or reheating, and they’re dishwasher-safe, so cleaning is a snap. This is a set of four containers, each with a different colored sleeve, so you can color-code lunches for the family or remember which holds herbs and which contains tomatoes. The sleeves can be removed if desired.

Several reviewers gave these containers high marks because they're shatter-resistant when cushioned with the silicone sleeves, though a few say they wish the containers themselves were a bit deeper.

Type of Glass: Borosilicate | Quantity: 4 containers (with lids and sleeves) | Lid Type: Silicone

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The 11 Best Glass Food Storage Containers  to Keep Lunches and Leftovers Fresh

Glass storage containers can be pricey, but Glasslock's nine-piece set breaks down to just $5 apiece. It includes rectangle, square, and round containers ranging from cup to cup capacities and is completely BPA-free. The standout feature of Glasslock containers, according to many reviewers, is the snap-down lids and silicone gaskets that create an airtight seal on each container, but are still easy to take on and off. 

In fact, customers can't stop gushing about the set. With more than 4, perfect five-star reviews, this Glasslock set has a vocal fan club. Shoppers love how leak-proof the containers are, as well as how they've held up over years of use. 

"I have used the small ones nearly every weekday to bring my lunch to work, usually placed sideways in my backpack," wrote a reviewer who has used them for more than three years. "In all that time, I have never experienced a leak, even when carting soup. It's great to have something made of glass, because I can stick it straight in the microwave at work (taking the lid off, of course) and not have to worry about melting or leaching as I would with plastic. I have also used the larger containers weekly to store food for the week, and have even put some of them in the freezer for long-term storage. So far, so good, and at this point, I would buy another set in a heartbeat if I needed it."

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  • After another round of testing, our picks remain the same, though we now recommend different size variations for some sets. We’ve also added options to our Notable competition section.

April 28,

We’ve tested dozens of food-storage containers over the years, subjecting them to repeated freezing, microwaving, and 3-foot drops onto hard floors. We’ve learned that most containers will break or wear down eventually, but we’re confident that our picks are the best options out there for stashing leftovers, packing lunches, or sharing at potlucks. If you prefer glass (which is odor-resistant and often oven-safe, though heavy), we recommend the durable Pyrex Simply Store Piece Set. For plastic (which is lighter and less likely to shatter), we recommend the leakproof Snapware Total Solution Piece Food Storage Set. Both are affordable options that will provide you with years of use.

The streamlined containers in the Pyrex Simply Store Piece Set are made from durable glass—they didn’t break in our drop tests. They stack neatly, and their lids are some of the easiest (among those we’ve tested) to put on and take off. Because the lids don’t clip closed like those on our runner-up pick, the Glasslock containers, we recommend exercising caution if you plan to transport liquids in the Pyrex containers. (We were surprised that the set’s round containers didn’t leak in our tests, but the rectangular ones are not leakproof, and a locking lid will still be best for preventing leaks and spills.) You can use this set in a microwave, freezer, preheated oven, and dishwasher.

In our leak tests, the Snapware Total Solution Piece Food Storage Set’s containers stayed sealed. And after being repeatedly dropped from waist height, they sustained only minor cracks on the edges of the lids. Also, stains and smells didn’t linger in these containers, and they looked great stacked in the fridge, filled with leftovers. The containers nest well, too, so in a cupboard they take up less space than much of the competition.

We like that the Glasslock Piece Container Set includes lids that seal to prevent spills, and these containers survived multiple drops from counter height. But after four years of long-term testing, some of our containers have chipped around their edges—a common complaint with most glass containers we researched. Their locking lids require more effort to close than the lids of our main pick, the Pyrex Simply Store Piece Set. And we suspect that the repeated stress of snapping the Glasslock containers’ lids shut is what caused some of them to chip (stacking the containers for storage can also cause stress on glass containers and lead to chipping). That said, if you’re looking for leakproof glass containers for meal prep, these are the best we’ve tested. The Glasslock containers come in a variety of shapes that store nicely in the fridge, and they are safe to use in an oven, microwave, freezer, or dishwasher.

The Rubbermaid TakeAlongs Food Storage Containers are perfect for transporting food to parties and other functions, and because they’re so cheap, you may not mind leaving pieces behind. This set comes in a variety of sizes, with containers that stack well for convenient storage. Scents and stains remained after washing, and a few containers leaked in our testing. But we think they’re the best option compared with other budget sets.

Everything we recommend

Why you should trust us

To find the best food-storage options, we’ve talked with several experts over the years about materials science and what makes a great container, including Nancy Hopkins, senior deputy food and entertaining editor for Better Homes & Gardens; Faith Durand, then executive editor and now editor-in-chief for Kitchn; and Michele Thomas, then executive editor at the International Culinary Center. Additionally, we reached out to glass experts including Jane Cook, PhD, then chief scientist at the Corning Museum of Glass in Corning, New York, and William C. LaCourse, PhD, a professor in the Glass Engineering Science department at Alfred University in Alfred, New York.

We’ve updated this guide after years of using these container sets in our test kitchen and in our own homes, storing leftovers in the fridge or packing lunches for our commutes. Anna Perling, who performed testing for and wrote our latest update, is a kitchen staff writer who has spent more than four years reviewing food-storage vessels, from travel mugs to food thermoses to lunch boxes. Her reporting built on senior staff writer Michael Sullivan’s deep dive into the science of glass and thorough durability testing over the course of several months. Ganda Suthivarakom, who wrote our original guide, spent dozens of hours researching and testing (and filling, shaking, storing, freezing, microwaving, washing, and dropping) food containers.

Who should get this

There are a few reasons to upgrade your containers, especially if you use plastic yogurt or takeout tubs. First, you can’t see through yogurt containers, so once the lid is on, you can easily forget what you have in there (and let it rot). Second, they aren’t leakproof, which means that transporting them to work for lunch can be a messy affair. Third, such plastic containers are not FDA-approved for repeat food storage or microwaving. By upgrading to more-durable glass or plastic food-storage containers, you can be confident that they’ll last longer and keep your food fresher (however, because the lids are usually plastic, you may still need to replace the ones that come with glass containers before the containers themselves give out). And if your current containers are chipped or warped, that’s another sign it may be time to replace them. They won’t seal properly, and a chip or crack will act like a snag in a pair of stockings—the crack can run and cause more damage down the line.

You may also want additional containers if you’re getting into meal prep (that is, portioning individual meals into separate containers to eat throughout the week). Our plastic recommendations are especially great for meal prep because they’re less expensive and light enough to carry to work. If you already own a glass or plastic container set but want something you can bring to potlucks and picnics, you may also want to purchase a set of cheap plastic containers you won’t mind leaving behind.

Choosing between glass and plastic containers

Six tall stacks of food storage containers, together with their lids, that we tested.

Wondering which material to get? Here’s our breakdown.

Choose one of our glass picks if any of the following apply:

  • You don’t mind heavier containers that can shatter.
  • You’re using the containers mostly for storage at home.
  • You store foods that tend to stain or smell.
  • You prefer oven-safe containers (though you should still double-check whether a container can go in a preheated or cold oven).

Choose one of our plastic picks if any of the following apply:

  • You want something that is less likely to shatter.
  • You want a cheaper option that you can leave behind at potlucks or stock up on for meal prep.
  • Your family members tend to lose containers.
  • You want something lighter to carry around.

Ultimately, the choice between plastic and glass is a personal one that’s based on lifestyle. Of the experts we interviewed, some preferred glass, some preferred plastic, and one even preferred zip-top plastic bags for leftovers. They chose what worked best for themselves and their families, and you can too.

A note on tempered vs. other types of glass

Containers are made from different types of glass, which will affect their durability, price, and how they’ll break if you drop them. Most glass food-storage containers, including the Pyrex and Glasslock sets we recommend, are made of tempered glass, a type of heat-treated soda-lime glass. Tempered glass is ideal for cooking and storing food because it’s very durable. It can survive being dropped on the floor, and it’s able to withstand dramatic temperature changes without cracking. Tempered glass does have one downside, however: On rare occasions, it can shatter unexpectedly (this may seem spontaneous, but it’s usually a result of thermal shock or repeated stress on the glass). That being said, tempered glass is often referred to as “safety glass” because when it does break, it crumbles into cube-shaped pieces that are easy to sweep up, as opposed to long, thin shards that can more easily cut you. (This is why tempered glass is used for side and rear windows in cars and glass shower doors.) To understand more on how and why this seemingly random breakage occurs, you can check out our blog post on the subject.

Some food-storage containers are made from borosilicate glass because it’s even more resistant to thermal shock, or sudden changes in temperature, than tempered glass. However, it’s more expensive, and it’s also more brittle than tempered glass—which means it may break more easily if you hit it against the counter or drop it on the floor. You may also find containers made from heat-strengthened glass, which is twice as strong as untreated glass yet not as strong as tempered glass. So compared with tempered glass, heat-strengthened glass is not as resistant to sudden changes of temperature or as durable if you drop it. You’re unlikely to find non-heat-treated soda-lime glass containers because they are neither oven- nor freezer-safe.

How we picked and tested

In reporting this guide, we talked with five experts, ranging from cookbook editors to glass scientists: Nancy Hopkins, senior deputy food and entertaining editor for Better Homes & Gardens; Faith Durand, then executive editor and now editor-in-chief for Kitchn; Michele Thomas, then executive editor at the International Culinary Center (and now a sommelier, wine educator, and writer); Jane Cook, PhD, then chief scientist at the Corning Museum of Glass in Corning, New York; and William C. LaCourse, PhD, a professor in the Glass Engineering Science department at Alfred University in Alfred, New York.

We also consulted reviews from Good Housekeeping, The Strategist, Reviewed, and The Spruce Eats. Finally, we looked for best-selling sets from Amazon, Bed Bath and Beyond, Wayfair, Target, IKEA, Williams-Sonoma, Food52, and The Container Store. For each of these, we combed through owner reviews. We also polled our staff for long-term-testing feedback and read the comments on this guide.

After years of research and testing, we know that whether you’re choosing glass or plastic, a good container should meet the following criteria:

  • Airtight and leakproof: “You want something that’s really airtight with a good seal, if it’s something you plan to keep for a bit,” Nancy Hopkins, senior deputy food and entertaining editor for Better Homes & Gardens, told us. Not only will a good seal help food last longer, but leakproof construction is also important for transporting liquids. We’ve found that round containers are usually more leakproof than square or rectangular containers. Many of the models we tested have a gasket seal around the lip and plastic hinges that snap shut, so you know the container is sealed properly.
  • Stain-resistant: Resistance to stains and odors is key—you don’t want to smell or see yesterday’s pasta and red sauce on your container. Plastic containers are more likely to stain than glass, but we’ve found that some are more stain-resistant than others.
  • Easy to clean: We wanted containers that could go in the dishwasher. For easier cleanup, we preferred containers that had sealing lids with removable gaskets because you can remove and wash them separately (this also prevents mold buildup). And we avoided lids that had microwave vents; they’re just another piece to de-crud, and you’re better off removing the latches and resting the lid on top of the container in the microwave (or not using the lid at all, as some manufacturers suggest).
  • Easy to stack and store: Containers that can nest or stack neatly will be easier to store and nicer to look at. And the shapes and sizes will affect how easy it is to store containers—square or rectangular containers will maximize fridge or freezer space. We tried to pick sets with a good range from large to small, with emphasis on rectangular or square space-saving shapes. We didn’t eliminate round shapes, though, because they can be good for liquid foods. We also preferred glass and plastic sets that had interchangeable lids among containers, so finding the right lid will be a little easier.
  • Heat-safe: We wanted containers that could go in the microwave, so that eliminated stainless steel. For glass containers, we also preferred options that were preheated-oven–safe or oven-safe so you can warm food in the same container.
  • Translucent: The containers should be clear or easy to see through, so you know what is inside without having to open them. So we avoided ceramic containers (they can also break easily).
  • Affordable: Plastic or glass storage containers range from about $3 to $10 apiece. Containers in a set are generally less expensive per piece. Although price was a factor when we made our pick, we also considered that glass containers will last a long time. Keep in mind that most manufacturers include both the containers and the lids in the total set count. So if a set is sold as 14 pieces or 16 pieces, you’re really getting only seven or eight containers.

Our tests built on our testing from previous years. We tested for leaks by filling containers with water and shaking them, before and after they had run through the dishwasher. To test how the containers would hold onto smells and stains, we filled them with tomato sauce, placed them in the refrigerator for five days and the freezer for two weeks, and reheated the sauce in the microwave for two minutes. Before reheating, we also checked the frozen tomato sauce for freezer-burn patterns, which indicate how tightly a container seals. And we submerged all of the lids in a large bowl of tomato sauce for 48 hours and then ran them through the dishwasher, as an additional stain and smell test. Usability is important in a container. We considered how easy each set’s containers were to open and close, how well they stacked, and how well their shapes and sizes would work with different types of foods.

Keep in mind that most manufacturers include both the containers and the lids in the total set count. So if a set is sold as 14 pieces or 16 pieces, you’re really getting only seven or eight containers.

Previously, we froze quarter-pound portions of ground beef for two weeks to look at freezer-burn patterns. And, most fun of all, we conducted a drop test from waist height for all of the containers (including glass ones) to see whether they would break or if the lids would pop off. In an attempt to simulate a non-bouncy kitchen floor, we did these drop tests on a piece of wood placed over cement.

In , we also subjected the glass sets to extreme thermal stresses (which is something we strongly do not recommend trying at home): We pulled the containers from the freezer and filled them with boiling water; we took containers that had been in a ºF oven for 10 minutes and filled them with ice water; we used the containers to reheat cold beef stew and tomato sauce in the microwave for three minutes; and, finally, we froze beef stew in the containers and put them directly into a °F oven for 10 minutes. Since most of our picks have remained consistent over the years, we didn’t repeat any drop or thermal shock tests in

Our glass pick: Pyrex Simply Store Piece Set

The Pyrex Simply Store Piece Set, our pick for best glass food storage container.

The classic, streamlined Pyrex Simply Store Piece Set is the best glass container set we’ve tested. Made from tempered glass, these sturdy containers survived multiple counter-height drops onto wood without breaking. Unlike other glass containers we tested, the Pyrex containers have a smooth rim that’s less likely to chip over time, and they look nice enough to use for serving. Though not all of the lids are watertight, they’re faster and easier to seal than the lids of our runner-up pick, the Glasslock containers (which require more force to clip closed). And because each shape of Pyrex lid is a different color, they’re easy to match to their corresponding containers. The lids will likely wear down faster than the containers themselves (especially if you run them through the dishwasher), but you can easily get replacements from Pyrex. This set stacks neatly and is safe to use in a microwave, freezer, preheated oven, and dishwasher.

We continue to be impressed by the durability of the Pyrex set: After years of use in our home kitchens, our containers haven’t chipped or cracked. We’ve heard this from a number of Wirecutter staffers. One person told us, “They’ve held up remarkably well over the last two to three years of regular use.” Another said: “I use them all the time, they’ve held up extremely well for years now. [I] dishwash them, top or bottom rack, wherever they’ll fit.” And yet another colleague told us, “I’d say I’ve had most of them for more than five years. Never had the glass part break.”

These containers were also impressive in our initial drop tests. They survived drop after drop onto a wood board placed over a cement floor. At one point, a container missed the board entirely and bounced off the cement without breaking. The containers also passed our thermal stress tests: They were still intact after we transferred them directly from a °F oven to the freezer and vice versa (we strongly urge you not to try this experiment at home). The Pyrex containers are fairly heavy, but that’s true of all the glass models we tested (for lighter containers, we recommend plastic options).

Instead of locking on with clips, the flexible Pyrex lids press on, and they don’t require as much force to put on or take off. They’re easier to seal than the similar Anchor Hocking lids we tested and than Glasslock’s locking ones. The lids come in different colors that correlate to differently sized containers, providing a visual cue to help match them together more easily. The lids are airtight, and we didn’t see any signs of freezer burn on our tomato sauce. Even though the round containers we tested didn’t leak in our tests, we would hesitate to throw them into a backpack with a computer. We also found that the rectangular containers leaked from the corners. However, since you can simply choose to store soups and stews in the round containers, we’re willing to forgive this minor drawback.

The rectangular and round clear glass bases of the Pyrex Simply Store Piece Set.

We recommend storing soupier foods in the round Pyrex containers; the rectangular ones leaked from the corners in our tests. Photo: Michael Murtaugh

The different colored round and rectangular lids of the Pyrex Simply Store Piece Set.

The Pyrex lids are color-coded to match with the differently sized containers. Photo: Michael Murtaugh

Close view of two of the round containers of the Pyrex Simply Store Piece Set.

For storage, you can nest the containers or stack them atop one another with the lids on. Photo: Michael Murtaugh

In our tomato-sauce tests, we could detect a slight aroma on the Pyrex lids after running them through the dishwasher, but the smell wasn’t as strong as the one left behind on some of the other containers we tested, like the silicone-rimmed Pyrex Ultimate containers. Pyrex’s plastic lids are obviously not oven-safe, and if you’re using a dishwasher to clean the lids, they should be placed only on the top rack.

The Pyrex set includes nine glass containers (with matching lids), and they range in size from 1 to 7 cups. The containers nest well, or you can stack the sealed containers on top of each other. The smooth, clean lines of the Pyrex pieces also look nice on a table, if you’re serving straight from the containers after reheating.

If you’re looking for fewer containers, the Pyrex Simply Store line is also available as a piece set (with seven containers and accompanying lids). You can purchase replacement tops on Pyrex’s website.

Pyrex offers a two-year warranty on the Simply Store containers, meaning the company will replace defective pieces from the set as long as they haven’t been subjected to misuse or abuse. Also, according to the company, Pyrex will replace any glass product that breaks due to oven heat. If this happens, just be sure to keep the damaged item, since you may be asked to return it. Contact the Pyrex Customer Care Center for returns or replacements.

Flaws but not dealbreakers

Like the other glass containers we tested, the Pyrex set we looked at had a number of visible flaws in the glass. These flaws aren’t noticeable unless you’re looking for them, but they can potentially weaken the glass and make it more prone to shattering, so it’s something to know before you buy.

Again, not all of the containers in this set are leakproof, so we don’t recommend using them to transport meals to work or school. Though the round containers didn’t leak any water in our tests, we’d still exercise caution if you intend to use them to transport liquids. Our runner-up pick, the Glasslock set, is best if you’re looking for an entirely leakproof glass option.

We’ve noticed some mixed feedback over how long the Pyrex lids can last. We’ve found that the lids can crack even when washed on the top rack after many years (about five). Several Amazon reviewers have complained that the lids can crack or warp even after just a few uses, but Wirecutter staffers reported that their Pyrex lids stayed intact even after two to three years. Pyrex does sell replacement lids if you need them. You may be able to prolong the life of your lids by hand-washing them, although it may be inconvenient to do so.

Our pick: Snapware Total Solution Piece Food Storage Set

The Snapware Total Solution Piece Plastic Food Storage Set, our pick for best plastic food storage container.

Out of all the plastic sets we tested, we recommend the Snapware Total Solution Piece Food Storage Set. This plastic set doesn’t offer the same durability as the glass Pyrex set we recommend—we’ve noticed that plastic containers may scratch, stain, or warp over time, while glass ones do not. But the plastic, locking Snapware set is cheaper, lighter, and more convenient for transporting food than our glass picks. Snapware is owned by the same company as Pyrex, and similarly, it offers replaceable lids and a long warranty. These sets have held up well over time in our home kitchens, too. For those reasons, we think the Snapware set is the best option from our picks if you want to prep your meal ahead and grab your container from the fridge on your way out the door.

The lids in the Snapware Total Solution set are easy to snap closed (unlike those in the Snapware Airtight set, which were difficult to latch and repeatedly popped open, or the Rubbermaid Brilliance lids, which sprang shut violently, like a mousetrap). With the Snapware containers, there’s also a small tab at the edge to leverage when you’re pulling the lid off, though you may not need it (these lids didn’t suction as much as ones like the Rubbermaid Brilliance). Still, the Snapware Total Solution containers and lids provided a tight seal, which prevented any signs of freezer burn and didn’t leak (even after a run through the dishwasher). With the locking tabs, these containers are more likely to stay shut than sets with press-on lids from IKEA or our budget pick, the Rubbermaid TakeAlongs.

Like most plastic lids, the Snapware ones retained a faint tomato-sauce scent after we marinated them separately in a large bowl of sauce for 48 hours, but they didn’t retain any stains. The containers themselves were also stain-free. In contrast, the Lock & Lock containers retained an oily orange residue (and when we previously tested the Snapware Airtight set and the Popit containers, we also found that these sets retained smells and stains). And the Snapware Total Solution set performed admirably in our drop tests: Only a small piece on the corner of the lid broke off, after the third drop.

The clear plastic round and rectangular bases of the Snapware Total Solution Piece Plastic Food Storage Set.

The Snapware set comes in a variety of shapes and sizes, with larger containers to store leftovers and smaller ones for dressings or sauces. Photo: Michael Murtaugh

Two stacks of lids for the Snapware Total Solution Piece Plastic Food Storage Set, our pick for best plastic food storage containers.

With their locking tabs and gaskets, the Snapware lids are leakproof. Photo: Michael Murtaugh

Close view of the snap closures on the Snapware Total Solution Piece Plastic Food Storage Set.

The Snapware lids are easier to snap closed than the lids on some other sets we tested. Photo: Michael Murtaugh

We appreciate that the Snapware containers nest, for easy storage, or stack neatly in the fridge and freezer. The set comes with 10 containers and matching lids in a variety of shapes and sizes that we think will work for most foods—from small circular containers for storing sauces or dressings to deeper, rounded rectangles for lasagna or curry. You can also write on the lids to label what’s inside (which is a nice touch, even though we prefer to label with removable tape).

The lids also work with glass Snapware containers, which is convenient if you’re buying both styles and don’t want to have to rummage through various lids in your drawer. We found the Snapware lids slightly easier to lock and pop off than the Glasslock lids (thanks to a small protruding tab at the rim). The key difference between the two containers is that you can remove the gaskets on the Glasslock lids for cleaning, but the gaskets on the Snapware lids we tested are attached. (The instructions on the Snapware Total Solution product page recommend removing the gasket for cleaning. But a company representative confirmed that these are the brand’s general-care recommendations and apply to the Airtight containers, which do have removable gaskets.) That’s a downside, but since the Snapware lids don’t have fine ridges, like the spongier gaskets on the OXO or Glasslock lids, we think the Snapware lids won’t trap grime as easily.

These containers are microwave-, freezer-, and dishwasher-safe. Snapware offers a lifetime warranty on both the plastic containers and the lids if “damaged during normal household use.” Wirecutter staffers who have owned a set for several years reported no issues with the containers or lids. Snapware also sells replaceable lids for every shape in the set if you need them: round, square, and rectangular. (Like Pyrex, Snapware is a Corelle brand.) If you need to make a claim, contact the company’s customer-care center; be sure to keep the container or lid because you may be asked to return it.

Flaws but not dealbreakers

As we mentioned, the gaskets on the lids aren’t removable, which makes cleaning more difficult compared with the Glasslock set. Over the years, we’ve noticed some stock fluctuation with these containers. If they’re sold out, we also like the OXO Good Grips piece Smart Seal Plastic Container Set, which we discuss in our Competition section.

Runner-up: Glasslock Piece Container Set

The Glasslock Piece Container Set, our runner up for best food storage container.

We recommend the Glasslock Piece Container Set only if you want a glass set that’s leakproof. Like a lot of glass containers we considered, these have a history of chipping over time (although many Wirecutter staffers report no issues after years of use). The Glasslock containers’ tight-fitting lids keep food fresher longer. But they also put pressure on the edge of the glass, which, according to the glass experts we spoke with, may be causing stress that results in breakage. (Several reviewers also mentioned that their containers chipped after they nested them for storage. We were told by Jane Cook, then chief scientist at the Corning Museum of Glass, that stacking glass can cause stress over time because the two hard surfaces rub together, and this may eventually lead to chipping. You can stack the containers on top of each other with the lids on instead, or layer a paper towel between containers.) That said, compared with other brands we tested, the Glasslock containers locked more securely without leaking and didn’t break or pop open when dropped. Per piece, the set also costs less than other glass options we considered.

The plastic lids have a firm silicone gasket that fills the lid groove from edge to edge and provides a tight seal that doesn’t leak. Though the gaskets are removable, they’re harder to pry off than the thicker rings on the OXO containers—we accidentally punctured the gasket on one of our Glasslock containers with a butter knife. Our testers found that the plastic flaps on the lids were more difficult to close than the press-on lids of the Pyrex glass containers, but that’s true of most locking containers. However, the Glasslock containers kept food fresher longer than much of the competition in our initial tests, indicating that they’re airtight. In our tests, greens remained sprightly, and cut strawberries tasted just a touch off after being refrigerated for two weeks. Tomato sauce didn’t show signs of freezer burn, and it didn’t impart stains or smells to the glass or to the plastic lid.

Impressively, the Glasslock set bounced in our drop tests, with no damage to the glass containers. The lids remained perfectly intact and didn’t pop off. (For kicks, we even tried dropping a Glasslock container onto cement. It broke on a corner only after three other attempts to crack the thing.) The glass Snapware set we tested didn’t fare as well in our drop tests: Some of the flaps opened, and the corner of the lid cracked.

The rectangular, square, and round clear glass bases of the Glasslock Piece Container Set.

The Glasslock containers are oven-safe and nice enough to serve from, just like the Pyrex containers. Photo: Michael Murtaugh

Stacked rectangular, square, and round blue lids of the Glasslock Piece Container Set.

The tabs on the locking Glasslock lids require a little more force to close than on the Pyrex press-on lids. But the Glasslock set is the best choice if you want a leakproof glass container set. Photo: Michael Murtaugh

The two piece lid and gasket of the Glasslock Piece Container Set.

A removable gasket makes the Glasslock lids easy to clean. You can pry the gasket off carefully with a butter knife, then press it back into the ridge of the lid after you’ve cleaned and dried it. Photo: Michael Murtaugh

The Glasslock set comes with nine square, rectangular, and round containers ranging from cup ( milliliters) to cups ( liters) in size. Though the containers are clear, you can choose to get them with clear lids with a sea-green gasket or with translucent cornflower-blue lids. This set has a wider range of shapes than the glass Rubbermaid Brilliance set. The Glasslock walls are thick but perfectly see-through, and same-shape containers of different sizes nest even with the lids on. These containers stack beautifully in the fridge, making it easy to see what leftovers you have.

Like Pyrex and Anchor Hocking, Glasslock makes its containers out of tempered soda-lime glass that’s oven-, microwave-, freezer-, and dishwasher-safe. Though we like the OXO 16 Piece Smart Seal Glass Container Set (which has a spongier gasket and lids that are easier to take off and clean), it’s far more expensive since the containers are made from borosilicate glass. And we still saw complaints of chipping in the reviews.

Glasslock will replace any worn-out or faulty lids free of charge (though you’ll have to pay a few bucks for shipping). You can order the right-size lid on its website by looking for the product code etched into the bottom of your container. If you buy your set directly through Glasslock’s website, the company will offer a full refund within 30 days of purchase as long as the containers are unused and in their original packaging.

Like all tempered glassware, the Glasslock containers can spontaneously shatter (albeit very rarely) due to surface damage, manufacturing flaws, or extreme thermal stresses. Beyond that, several pieces we’ve long-term tested have chipped around the edge, and we’ve heard other people complain of the same thing. We’ve also read reviews that the containers’ body chips over time. The chipping is probably due to the pressure that the locking lids put on the glass when you snap them shut, or from stacking the containers. William LaCourse, a professor in the Glass Engineering Science department at Alfred University, told us, “There will be stresses as a result of the cap and putting the cap on with fairly high pressure … it essentially squeezes the cap onto the glass.” He explained that if there are any minor flaws already present in the glass, the added pressure from the lids could cause the containers to chip or break. Cook said that you can also put stress on glass by rubbing it against a material as hard or harder than itself (which happens when you stack glass containers on top of each other). That stress is also exacerbated when you stack warm containers that have expanded.

If you’re committed to getting the Glasslock containers because you want glass containers that don’t leak, we don’t think the concern of chipping or breakage should stop you. Only a small number of the containers we’ve tested have chipped. We also subjected the Glasslock containers to extreme thermal stresses, and they survived unscathed. And we’ve previously ordered sets from different retailers to check for any breakage during shipping. Just keep an eye out every time you open a container: The only thing you don’t want is a piece of glass in your food. And if you’re going to choose glass over plastic, keep in mind that all glassware is inherently brittle and needs to be handled with care.

If you don’t have a dishwasher, you may need to remove the gaskets from the Glasslock lids to clean them and prevent any mold buildup. (This seems to happen only to sets that people hand-wash.) Carefully dig the gasket out with a butter knife so you don’t knick it, wash it with hot water, and let it dry completely before you reassemble the lid.

Some Amazon reviewers have complained that the flaps on the lids of the Glasslock containers make a racket when snapped shut. But we don’t think this is a dealbreaker because it’s just a split second of noise; other containers, like the Rubbermaid Brilliance, were louder.

Long-term test notes

Marilyn Ong, supervising editor on our kitchen team, has owned Glasslock containers for roughly five years, and she uses them frequently to store leftovers for her family of five. She hasn’t experienced any glass chipping, though the flaps on the lids for her round containers did start to break off after about four years. She ordered new lids for free from the Glasslock website, paid a few dollars for shipping, and received them less than a week later.

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