A snap-on lid designed to allow easy open and close of WECK jars. Food expand when they freeze, so these lids will expand to prevent pressure from breaking the glass jars. Made of BPA-free plastic, the lids will not react with foods or absorb odors. Recommended particularly for refrigerator and freezer storage. Great also for a convenient alternative lid to store sourdough starters.
Food safe, dishwasher safe, fridge safe, freezer safe.
Size M: Fits Mold 976, Mold 900, Tulip 746, Cylinder 908