Sturdy hot cup lids lock tightly to prevent spills on the go. Designed to fit Boardwalk® Convenience Pack Paper Hot Cups, as well as other Boardwalk® Paper Hot Cups. Fits: 10-20 oz Hot Cups; Material(s): Polystyrene; Color(s): Black; For Use With: Boardwalk® Paper Hot Cups, 10-20 oz.