12Pcs/lot Silicon Stretch Lids for Universal Food Wrap Bowl. Made of Food grade silicone material, BPA Free, environmental for using. High heat resistant and flexible, suit for -40F to +446F (-40c to +230c). Perfect tool to keep fresh in refrigerator. Material: Food grade silicone. Size: As pictures show. Cookware Parts Type: Lids. Color: White, Blue, Yellow, Pink. Shape: Round, Square. Advantage: Heat resistance flexible. Temperature: -40F to +446F (-40c to +230c). Package included: 12pcs silicone cover lids.