Keep a lemon fresh in the refrigerator, freeze a casserole or reheat a plate of leftovers in the oven or microwave with these six reusable lids. Made of super-stretchy clear silicone that's textured on the inside for a tight cling, the round lids provide an airtight, leak-proof seal on a variety of dishes and pans. The durable lids even allow for stackable storage and clean up easily in the dishwasher between each use.