Question: are weck jars freezer safe?
Answer: Weck jars are dishwasher, freezer, and microwave safe. ... WECK Round Rim jars with plastic 'Keep Fresh' covers are perfect for freezing foods. The ¼ liter mold jars and the 1 liter tulip jars have straight sides and 3.875 inch opening, and the 'Keep Fresh' lids fit securely on the jars.”