Charles Viancin The Sunflower X-Small, Medium & Large Silicone Suction Lid & Food Cover (Set of 4) Set of 4 includes 11.5", 9.5" & 4" in diameter Lids Seals Tight: on all smooth rims: stainless steel, glass, plastic, melamine Prevents Spills: the Sunflower Lid creates an airtight, watertight seal for reheating and storing FDA Food Grade Silicone Oven, microwave and dishwasher safe