Round Aluminum To-Go Container Lids, Dome Lid, 9" Diameter, Clear, Plastic, 500/Carton These lids are perfect for use with Boardwalk Round Aluminum To-Go Containers. Lid helps keep food warm and prevents spills during transport. Ideal for hot or cold foods. Dome Lid. Food Container Type: Lid; Material(s): Polystyrene; Material Type: Plastic; Color(s): Clear.