... stainless steel, glass, plastic, or melamine.It prevents spills by creating an air and watertight seal.The Lid adjusts to fit almost ... or container can be used for food storage. Lid creates an airtight, watertight seal for reheating and storing.It can also ... steel, glass, plastic, and melamine.Prevents Spills: The Lid creates an air & watertight seal.Perfect for reheating and storing.Saves on ...