Silicone lids and cover This silicone lids are made of durable silicone provides the strong stretchable fit to the odd shape and size container. Features: the silicone storage covers come in 6 sizes so there's always one that fits. Silicone tops are round yet stretchy enough to fit snugly over odd-shaped mugs, pots, bowls, and containers. Leak-proof with an air-tight seal so foods stay fresh and tasty. Microwave-safe and heat-resistant to 450 fahrenheit so you can quickly reheat and enjoy delicious leftovers. A money saver, eliminating the need to repeatedly buy an expensive plastic wrap. Easy to clean and dishwasher safe. Anti-slip, anti fall, wear-resistant, difficult to deformation.