These 32 ounce flat plastic cup lids are clear and are made from polylactic acid (PLA), which is made from agricultural crops such as corn and potatoes. Straw hole. They are fully biodegradable and compostable. There are no animal or petrochemical ingredients in the cups. For use with cold beverages. Case of 600 (12 packs of 50). Eco Categories: Biodegradable, agriculturally based, less toxic, animal friendly, reuseable.