This SOLO VL34R-0007 disposable white plastic flat vented lid is suitable for use with 4 oz. SOLO Bare Eco-Forward PCF, SOLO Bare Eco-Forward Single Sided PLA, and SOLO single-sided poly hot cups (sold separately). This lid seals the hot cup for resistance to splashing and splashing, and to slow the loss of heat from the cup's contents. It is made of polystyrene for rigidity and durability. This lid is vented to allow steam to escape for resistance to the buildup of steam pressure within the cup. This plastic vented lid has a 2.5" top diameter and is 0.3" tall.Disposable food service products are used to store, insulate, transport, prepare, and serve food and drink. They may be made of paper, plastics, or metal foil. Food service products for freezing items protect their contents from freezer burn, contamination, and drying.SOLO manufactures disposable plastic, paper, foam, and post-consumer recycled content cups, plates, and other products for food and beverage service. The company, founded in 1936, is headquartered in Lake Forest, IL.