Weck Jars

Yes, these jars are freezer-safe. When freezing, be sure to leave about an inch of headspace at the top to allow for liquid expansion and prevent the glass from cracking.

The Weck system makes it easy to check your seal visually. Once the jar has cooled after processing, the stainless steel clamps can be removed; if the lid remains firmly attached to the jar, you have achieved a successful vacuum seal.

Yes, the soda lime glass is microwave-safe. However, you must remove the stainless steel clamps before placing the jar in the microwave.

The rubber rings are designed for a single use during the canning process to ensure a reliable, airtight seal. You can easily purchase replacement rings when you are ready to start your next batch.

Yes, the jars are specifically designed with a stackable shape. This allows you to maximize your shelf space by nesting them securely on top of one another.

The wide-mouth opening makes these jars exceptionally easy to fill with ingredients like overnight oats or chopped fruits. It also allows for easier cleaning, as you can reach the bottom of the jar without difficulty.