How to Choose Freezer Safe Containers | Storage That Lasts

For the full breakdown, see our best Containers For Freezer guide.

Opening your freezer to find cracked containers or frostbitten food is a waste of time and money. The right container keeps food fresh for months and prevents messes. Most people grab whatever Tupperware is handy, but that’s a mistake—food expands as it freezes, and non-freezer-rated containers can shatter or leak. Here’s how to pick containers that actually survive the cold and protect your food.

What Makes a Container Freezer Safe?

A freezer-safe container must handle sub-zero temperatures without becoming brittle or cracking. It must also block moisture vapor, resist oil and grease, seal tightly to keep odors out, and hold up to repeated freezing and thawing.

Look for an explicit “freezer-safe” label or marking on the container or its packaging. Never assume a container is safe for the freezer just because it feels thick or sturdy—only plastics specifically labeled for freezer use are reliable. Glass containers should be tempered glass designed for temperature extremes, such as wide-mouth canning jars made for home freezing.

The same container may be microwave-safe or dishwasher-safe, but those ratings don’t guarantee freezer compatibility. Check each claim separately.

Materials That Work in the Freezer

The best-supported materials include glass canning jars, ceramic containers, plastic freezer bags, plastic freezer containers with tight lids, and freezer wraps made of plastic, paper, or foil. Each serves different foods and storage durations.

• Glass canning jars: Use only wide-mouth, tempered jars designed for freezing. Leave at least an inch of headspace for expansion. Avoid jars not made for home freezing—they can crack or explode.
• Plastic freezer containers: Rigid, food-grade plastic with snap-on lids is ideal for soups, stews, and leftovers. Verify the container is labeled for freezer use, not just for pantry storage.
• Plastic freezer bags: Great for meat, fruit, and vegetables. Squeeze out excess air before sealing. Never use regular storage bags or trash bags—they aren’t moisture-vapor resistant and cause freezer burn.
• Freezer wraps: Plastic wrap, heavy-duty aluminum foil, and freezer paper work for wrapping cuts of meat or fish. Double-layer for extra protection.

Choosing the right shape also matters. Straight or flared sides help frozen food release easily. Square or rectangular containers pack more efficiently than round ones, saving freezer space.

Can You Freeze in Any Glass or Plastic Container?

No. Glass that isn’t tempered for temperature extremes can shatter when frozen. Single-use containers like ice cream tubs, milk cartons, and takeout deli containers are not designed for freezing. They crack easily, let in odors, and may leak. Even if they survive the freezer once, their plastic degrades with reuse and may transfer chemicals into food.

Scratched, cracked, or visibly worn containers should also be thrown out—bacteria can hide in scratches, and cracks can widen in the cold.

Freezer Container Rules: Size, Headspace, and Sealing

The U.S. Department of Agriculture recommends not freezing fruits and vegetables in containers larger than a half gallon. Larger containers freeze too slowly, which hurts food quality and can make the center spoil before it freezes solid.

Always leave headspace when filling containers. Liquids and semi-solids expand as they freeze. Without extra room, lids pop off and containers crack. For rigid containers, an inch of space is a good rule. For jars, follow canning guidelines specific to your jar type.

Seal containers with airtight lids. For bags, press out as much air as possible before closing. Then label each container with the food name and date. Frozen food stays safe indefinitely at 0°F, but quality declines after a few months.

If you are ready to buy containers, check out our tested roundup of the best containers for freezer that combine durability, space efficiency, and food safety.

FAQs

How can I tell if a plastic container is safe for the freezer?

Look for the words “freezer-safe” printed on the bottom of the container or on the original packaging. Some plastics also have a snowflake symbol. If you don’t see either, assume the container is not designed for freezer use and choose a different one.

Is it safe to freeze food in Mason jars?

Yes, but only if you use wide-mouth, tempered Mason jars made for home canning and freezing. Leave at least one inch of headspace. Avoid narrow-mouth jars and jars with any cracks. Thaw them slowly in the refrigerator to prevent thermal shock.

Can I reuse plastic takeout containers for freezing?

It is not recommended. Most takeout containers are single-use plastics and are not designed for freezing. They become brittle at low temperatures, develop cracks, and may leach chemicals into food. Use them for dry pantry storage instead.