Nukitchen - Silicone Super Sealin&rsquo; Suction Lids - ECO Friendly - Say Goodbye to Saran Wrap - Super Suction Seal - Universal Fit - Set of 4- (Dark Blue) These give a serious instant seal. Look at our pictures! can life a 5 pound pyrex Bowl! My sister who helps with photos had trouble lifting the bowl because it was so heavy! These lids will seal Fresh nearly every bowl is your kitchen: works with plastic, glass, stainless steel, ceramic. Creates an airtight, watertight, and spill proof seal for reheating and storing. Use for microwave lid to keep that microwave clean FDA Food Grade Silicone - can take the heart up to 450F. Safe for oven, freezer, refrigerator, Microwave, and Dishwasher.