Vented to allow steam to escape. Reduces dribbles and spills. Open sip-through design. Sip-Thru Lid—Perfect for hot or cold use. Helps reduce spills while allowing sipping on the go. Fits: 10 oz to 12 oz Foam Cups; Material(s): Plastic; Color(s): White; For Use With: 10J10; 10KY10; 12FJ10.