Snapware Airtight Clear Rectangle Lid w/Blue Rubber Gasket for 3.5, 4.5 or 10.8 Cup Plastic Containers Snap Lock Lids are airtight and leak-proof for secure storage Gasket easily Removed to wash before use to optimize seal Non-porous surface does not absorb food odors, flavors or stains 100% BPA Free Plastic Made in the U.S.A