This lid fits the 1 Cup Pyrex bowl Non-Porous Surface Will not Absorb Strange Odors and Flavors 102 Percent BPA-Free & Made in the U.S.A. Safe for Fridge, Freezer, and Microwave Use Top-Rack Dishwasher Friendly Pyrex covers / lids make cooking, serving and storing easy and convenient. These lids are made of a non-porous surface, which does not absorb food odors, flavors, or stains. Lids can be used in the refrigerator, freezer, or microwave and can be cleaned on the top rack of the dishwasher. These covers / lids are made in the U.S.A.