Features: 1.The silicone storage covers come in 6 sizes so there's always one that fits. 2.Silicone tops are round yet stretchy enough to fit snugly over odd-shaped mugs, pots, bowls, and containers. 3.Leak proof with an air-tight seal so foods stay fresh and tasty. 4.Microwave-safe & heat-resistant to 450 fahrenheit so you can quickly reheat & enjoy delicious leftovers. 5.Environmentally-friendly, and a money saver, eliminating the need to repeatedly buy expensive plastic wrap. 6.Easy to clean and dishwasher safe.