FDA approved silicone
• Seals Tight on all smooth rims: stainless steel, glass, plastic, melamine.
• Prevents Spills, the Lily Pad Lid creates an airtight, watertight seal for reheating and storing.
• Saves on Plastic Wrap, it can be reused and reused and reused.
• Safe for oven, microwave, freezer and dishwasher.