Tight, leak-resistant seal protects contents from contamination and helps prevent messy leaks and spills. Exceptional temperature resilience enables use in freezers, refrigerators and microwaves. Clear lid allows for easy identification of contents. Special Fog Gard™ coating. Medium Flat Lid. Food Container Type: Lid; Material(s): Polystyrene; Food Container Material Type: Plastic; Color(s): Clear.