Dart Polystyrene (Number 6) Insulated Foam Hinged Lid Containers. Patented Performer perforated hinge that allows the containers lid to be removed. Secure closure to prevent accidental openings. Superior insulation appropriate for hot and cold applications.. Length: 8.4 in / Width: 7.9 in / Height: 3.3 in Convenience is the key with Dart foam hinged lid containers. Secure closure improves handling and helps protect against accidental openings. High insulation qualities make them ideal for transporting and storing both hot and cold foods. Carryout service wouldnt be complete without them. Twelve popular sizes of Dart foam hinged lid containers feature the Performer perforated hinge. This one of a kind feature allows the containers lid to easily be removed, making for a less cluttered dining experience and providing an extra plate for meal sharing.