Weck Mold Jar

Yes, the glass jars are microwave and dishwasher safe. While the glass is freezer-safe, you should use plastic keep-fresh covers instead of the glass lid and metal clamps to prevent breakage during freezing.

The Weck system uses a rubber gasket, a glass lid, and two metal clamps to create a vacuum seal. It is more secure for long-term canning and offers a cleaner, more aesthetic look than traditional metal screw-top lids.

Absolutely. The 12.5-ounce capacity and wide opening make them ideal for single-serving meals like overnight oats, chia puddings, or layered salads. The wide mouth also makes them very easy to clean by hand.

If you are using them for standard pantry storage or meal prep, the gaskets can be reused many times. However, if you are using them for water-bath canning, it is recommended to use a new gasket for each batch to ensure a proper, safe seal.

The metal clamps are durable, but they are not stainless steel. To prevent rusting, it is best to remove the clamps before putting the jars in the dishwasher and ensure they are completely dry before storing.