Vented design keeps beverages hot but allows steam to escape, preventing a condensation-related watered-down taste. Flat face enables space-saving storage and dispensing. Secure-fit rim keeps liquids from leaking. Fits: 10-14 oz Foam Cups; Material(s): Foam; Color(s): White; For Use With: Dart? 10-12 oz Small Drink Cups, Dart? 14 oz Big Drink Cups, Dart? 12 oz Thermo-Glaze Cups.