Dart 20 oz HIPS Plastic Non-vented Lid - Translucent Breakroom - 4.2" Diameter - Translucent - Plastic, Foam, Polystyrene Body - 100 / Pack - 10 / Carton Top every Dart foam cup and container (none included) with these HIPS Plastic Non-Vented Lids. From high-dome to straw-slotted, insulating foam to SipThru, Dart designed these lids to not only complement every cup and container but also every application you can devise. 20 oz., High Impact Polystyrene (HIPS) lids are perfect for covering hot and cold contents.