LidLover's Universal Lid fit most round bowls and plates to quickly create airtight kitchen storage containers. The unique triple-ring feature inside each lid means that you'll always have the right-sized lid. One lid will fit and seal bowls and plates of various sizes. LidLover reduces the number of storage containers and lids needed, saving precious storage space. So easy to use. LidLover's Universal Lids work rightside up or upside down. Simply place LidLover over the bowl or plate and press the center to create an airtight seal that keeps flavors in and contents fresh, and keeps air or humidity out. Use for food storage in the fridge or grain and flour storage, and bulk foods. Use as a trivet in the microwave, too. Fits up to 12-inch bowls and plates made from porcelain, ceramic, stainless, glass, bamboo, and plastic. It is durable and reusable, more economical than using foil or plastic wrap, and nonstick for easy cleanup. Made from high-quality, FDA-approved silicone that?s temperature safe, from -40°F to 400°F, for use in the freezer, oven, and microwave. Top-rack dishwasher safe.