Ball canning jars are freezer-safe, but only if you follow the right steps
Yes, Ball canning jars can go in the freezer. The glass itself handles cold temperatures without cracking, but the way you fill and seal them matters. Freezing food in these jars works best when you leave headspace, use the right lid type, and let hot food cool before freezing. Done correctly, Ball jars hold frozen soups, stocks, sauces, and prepared meals for months.
The main risk is not the glass but the lid and the seal. Standard two-piece canning lids (the flat lid and screw band) are not designed for freezer storage and can lose their seal as the contents expand and contract. Freezer lids, which have a different gasket material, are the safer choice. Even then, the jar itself needs proper headspace to accommodate expansion without pressure building up inside.
Key Takeaways
- Ball jars made of tempered glass are freezer-safe, but standard canning lids are not — use freezer lids instead.
- Leave at least one-half inch of headspace for pints and one inch for quarts to allow food to expand without breaking the jar.
- Cool hot food to room temperature before freezing to prevent thermal shock and lid failure.
- Frozen food in Ball jars keeps for two to three months for most items, though quality declines over time.
Why Ball jars work in the freezer but canning lids do not
Ball jars are made from tempered glass designed to withstand temperature swings. The glass itself will not shatter from freezing. The problem is the lid. Standard two-piece canning lids have a rubber gasket formulated for the heat of the canning process, not the sustained cold of a freezer. As the contents freeze and expand, then thaw and contract, the gasket loses its grip on the jar rim, and the seal fails.
Freezer lids, sold separately from canning lids, have a gasket made to stay flexible in cold temperatures. Brands like Ball and Kerr sell freezer lids in packs of 12 or 24. They fit the same screw bands as canning lids, so you can use your existing bands. The flat freezer lid itself is the only part you need to replace. If you plan to freeze often, buying freezer lids upfront is cheaper than replacing failed seals or dealing with freezer burn on exposed food.
How to freeze food safely in Ball jars
Start with clean jars and lids. Wash them in hot soapy water and dry them completely. Fill the jar with cooled food, leaving headspace — at least one-half inch for pints and one inch for quarts. This space is critical. As food freezes, it expands. Without room, pressure builds inside the jar, and the lid can pop off or the glass can crack.
Place the freezer lid on the jar and screw the band down firmly but not so tight that you cannot turn it by hand. Overtightening can crack the jar rim when the contents expand. Let the jar sit at room temperature for 30 minutes, then move it to the freezer. Do not freeze hot food directly — the thermal shock can crack the glass and damage the seal. If you are freezing a hot liquid like broth or soup, let it cool in the refrigerator first, then transfer to the freezer.
Label each jar with the contents and the date. Most frozen foods in Ball jars keep for two to three months at zero degrees Fahrenheit or below. Soups and stocks last longer than foods with high fat content, which can go rancid. Check the jar before opening — if the lid has popped off or the contents look discolored, discard it.
What foods freeze well in Ball jars
Liquids and semi-liquids freeze best: broths, stocks, soups, sauces, and gravies. These expand evenly and do not create air pockets that lead to freezer burn. Cooked grains, beans, and stews also work. Dairy-based sauces can separate when thawed, so taste before serving and stir well.
Avoid freezing foods with high water content that will turn mushy when thawed — raw vegetables, fruits, and cooked pasta. Eggs in the shell will crack. Mayonnaise and oil-based dressings separate. If you are unsure whether something will freeze well, freeze a small test batch first and thaw it to see the result.
Thawing frozen food from Ball jars
Move the jar to the refrigerator and let it thaw slowly, usually overnight or over a few hours depending on the size and contents. Do not run hot water over the jar or place it directly on a heat source — the temperature change can crack the glass. Once thawed, transfer the food to a pot or pan to reheat.
If you need the food faster, place the sealed jar in a bowl of cool water and change the water every 30 minutes. This thaws the contents more quickly than the refrigerator but more safely than direct heat. Once thawed, use the food within three to four days.
Differences between freezer lids and canning lids
| Feature | Canning Lids | Freezer Lids |
|---|---|---|
| Gasket material | Heat-resistant rubber | Cold-resistant rubber |
| Best use | Hot-water bath or pressure canning | Freezer storage |
| Reusable | No — one use only | Yes — up to 5 times |
| Cost per lid | Around $0.15 to $0.25 | Around $0.30 to $0.50 |
| Seal reliability in freezer | Poor — gasket hardens in cold | Good — gasket stays flexible |
Common mistakes that cause freezer jar failures
Using canning lids instead of freezer lids is the most common error. The seal fails silently, and you do not know until you open the jar and find freezer burn or ice crystals throughout the food. Filling the jar too full is the second mistake. Without headspace, the expanding food pushes the lid off or cracks the jar. Even a quarter-inch less headspace than recommended can cause problems.
Freezing hot food directly into the jar is another frequent cause of failure. The heat can warp the lid and break the seal before the contents even freeze. Overfilling the band — tightening it as hard as you can — also causes cracks. The band should be snug enough that you cannot turn it by hand, but not so tight that you strain to loosen it later.
Frequently Asked Questions
Can I reuse freezer lids?
Yes, freezer lids are reusable for up to five times if the gasket is not damaged. Inspect the rubber gasket before each use — if it looks cracked, hardened, or worn, replace it. Canning lids, by contrast, are single-use only and should never be reused.
Will a Ball jar crack if I pour boiling liquid into it and then freeze it?
Possibly. The sudden temperature change can cause thermal shock, which cracks the glass or breaks the seal. Always cool hot food to room temperature before freezing. If you are canning with heat, that is a different process and uses canning lids, not freezer lids.
How long can I keep food frozen in Ball jars?
Most foods keep for two to three months at zero degrees Fahrenheit or below. Quality declines over time — flavors fade and freezer burn develops. Soups and stocks last longer than fatty foods. Always label jars with the date so you know how long they have been frozen.
Can I freeze milk or cream in a Ball jar?
Milk freezes but separates when thawed, so it is best used in cooking rather than drinking. Cream can freeze but may become grainy. If you freeze dairy, leave extra headspace — dairy expands more than most foods. Thaw slowly in the refrigerator and stir well before using.
What size Ball jar is best for freezing?
Pint and quart jars are the most practical for freezing. Smaller jars thaw faster but take up more freezer space. Larger jars take longer to thaw and are harder to fit in the freezer. Choose based on how much you typically use at one time.