Snapware Airtight Plastic Food Storage Container Set (4-Piece) Snapware Airtight Plastic Food Storage Container Set includes two 1.3-cup square plastic containers with lids. Airtight, leak-proof lids with 4 locking tabs lids with double silicone seals open and shut easily and are leak-proof and airtight. Remove and wash each gasket before use to optimize seal. BPA-free polypropylene container and lid are microwave, freezer, and dishwasher (lid top-rack only) safe. Snapware plastic products come with a limited lifetime warranty against manufacturer defect.