Kuke Bright Colors Silicone Suction Lids Food Covers Bowl Covers for Microwaves,Pots, Pans, Mugs and Containers (4-Pack) Material:Made of Shatterproof food grade silicone 4 bright colors silicone food lids with 4 different sizes- 12 in,10.5 in,8 in & 6 in Each silicone suction lid creates an air-tight seal to keep foods fresh for storing Fits most smooth rimmed containers including stainless, metal, plastic, mugs, pots, glasses bowls and so on Environment-friendly ,easy to use, clean and store