REUSE & REDUCE: A Smart and reusable alternative to single use plastics, disposable plastic wrap, aluminum foil, and plastic lids. 100% Platinum Silicone. Better preservation The “vacuum” is obtained by pressing in the center of the lid. Does not let out odors or liquids. They fit comfortably to any container of different shapes and sizes. Perfect to keep containers, cans and even food like watermelons, oranges, and onions fresh. Due to the product elasticity, it easily adjusts to containers, and even to cut fruit or vegetables. 100% Platinum Silicone. High quality material, hygienic, light, unbreakable. The thickness of the silicone protects the food from frost. Easy to clean. Dishwasher safe.