6 Best Canning Jars for Freezing
Freeze tomatoes without cracked jars. This guide reviews the 6 best freezer-safe Ball jars, highlighting the straight-sided designs essential for success.
There’s nothing more frustrating than opening your freezer to find a cracked glass jar, your beautiful summer tomato harvest now a frozen, icy mess. It’s a common mistake, but one that’s entirely avoidable with a little bit of knowledge. The secret isn’t in the glass itself, but in the shape of the jar you choose.
Disclosure: As an Amazon Associate, this site earns from qualifying purchases. Thank you!
Why Straight-Sided Jars Prevent Freezer Cracks
The science behind cracking jars is simple: water expands when it freezes. When you freeze tomatoes, sauce, or juice, the water content expands by about 9%. This expansion needs somewhere to go.
Most standard canning jars have "shoulders"—a curve near the top where the jar narrows before the threads. As your tomatoes freeze from the top down, the expanding ice gets trapped below this shoulder. The pressure builds and builds until something has to give. That something is the glass.
Straight-sided jars, on the other hand, have no shoulders. The walls go straight up from the base to the opening. This design gives the expanding food a clear, unobstructed path to move upward. The pressure is released vertically instead of pushing outward against the glass, virtually eliminating the risk of cracks.
This is why you’ll see many Ball jars specifically marked as "Freezer Safe" on the box. They aren’t made of special glass; they simply have the correct, straight-sided shape for the job. Choosing the right shape is the single most important factor for successfully freezing in glass.
Ball Wide Mouth Pint Jars for Easy Filling
When you’re dealing with chopped tomatoes or a thick, chunky sauce, the Ball Wide Mouth Pint is your workhorse. The wide opening makes filling a clean, simple process, minimizing spills on the counter and frustration in the kitchen. You can easily use a ladle or spoon without fighting a narrow opening.
These 16-ounce jars hit a sweet spot for portioning. A single pint is often the perfect amount for a family pasta dinner or a batch of chili. They are big enough to be useful but small enough that you’re not forced to thaw a massive quantity for a weeknight meal. Their simple, straight design also makes them incredibly easy to stack in a chest freezer.
Ball Wide Mouth Half-Pint Jars for Sauces
Don’t underestimate the utility of the 8-ounce half-pint jar. These are the ideal size for freezing smaller, more concentrated portions of your tomato harvest. Think rich pizza sauce, seasoned pasta sauce for two, or a simple tomato base you can build on later.
The wide mouth is just as useful here as it is on the larger pint jars, making it easy to scrape out every last bit of sauce. Freezing in these smaller increments reduces food waste, as you only thaw what you need. It’s far better to grab two small jars than to thaw one large one and watch half of it go bad in the fridge.
Ball Wide Mouth 24 oz Jars for Large Batches
For those who cook for a crowd or prefer to process their harvest in bigger batches, the Ball Wide Mouth 24 oz jar is a game-changer. This size is perfect for freezing enough crushed tomatoes or sauce for a large pot of soup, a hearty stew, or a family-sized lasagna. The straight-sided design ensures it freezes just as safely as its smaller counterparts.
The main tradeoff here is convenience versus flexibility. A 24-ounce jar is incredibly efficient for storage space and processing time. However, it commits you to a larger meal. If your household needs vary, it might be better to stick with pints, but for predictable, large-scale cooking, these jars are unbeatable.
Ball Quilted Crystal 4 oz Jars for Tomato Paste
Making your own tomato paste is a rewarding way to use up a glut of romas, but storing it can be a pain. The tiny 4-ounce Ball Quilted Crystal jars are the perfect solution. They allow you to freeze just a few tablespoons’ worth at a time, mimicking the quantity you’d get from a store-bought can.
This prevents the common problem of opening a can of paste, using two tablespoons, and forgetting the rest in the back of the fridge. The quilted pattern is mostly decorative, but the jar itself has a straight taper, making it freezer-safe. Just be sure to leave adequate headspace, as even a small amount of paste will expand.
Ball Quilted Crystal 12 oz Jars for Stews
The 12-ounce quilted jar is a fantastic middle ground between the half-pint and the full pint. It’s an ideal size for freezing a hearty lunch portion of tomato-based soup or stew. It’s also great for a side of stewed tomatoes to serve with dinner.
Like its smaller cousin, this jar has a gentle, straight-sided taper that allows for safe expansion during freezing. The slightly taller, slimmer profile can also make it easier to fit into a crowded upright freezer door. It’s a versatile size that often gets overlooked but proves its worth time and again.
Ball Collection Elite Pints for Easy Labeling
While functionally the same as the standard wide-mouth pint, the Ball Collection Elite series has one distinct advantage: a completely smooth, label-friendly surface. The absence of embossed logos or patterns on the main body of the jar makes applying and removing labels a breeze.
This might seem like a small detail, but proper labeling is critical for managing a freezer inventory. Knowing whether a jar contains plain crushed tomatoes from August or a seasoned marinara from September saves you guesswork and ensures you’re rotating your stock properly. If you value clear organization, these jars are a worthy investment.
Headspace and Lids: Keys to Freezer Success
Choosing the right jar is only half the battle. The other critical component is leaving the proper amount of headspace—the empty space between the top of the food and the rim of the jar. For freezing, you need more headspace than you do for canning.
A good rule of thumb is to leave at least one full inch of headspace. This gives the expanding tomatoes plenty of room to move up without pushing against the lid or the glass. Some people even prefer 1.5 inches, just to be safe. Under-filling is always safer than over-filling.
When it comes to lids, you have options. You can use the standard two-piece metal lids that come with the jars. Just don’t tighten the band excessively before freezing; screw it on until it’s just "fingertip tight." Alternatively, Ball and other brands make one-piece plastic storage caps that are perfect for the freezer. They are reusable, easy to wash, and eliminate any risk of rust.
Ultimately, preventing freezer cracks comes down to physics, not luck. By choosing straight-sided jars and leaving generous headspace, you give your expanding food a safe path to follow. It’s a simple shift in practice that protects your hard-earned harvest and ensures you can enjoy the taste of summer all winter long.
