These flat cup lids w/an opening for a straw fit the 16/18 ounce Fabrikal cups (also fit the Taiwan 14 and Fabrikal 16/18 ounce cups). The lids are clear and are made from polylactic acid (PLA), which is made from agricultural crops such as corn and potatoes. They are fully biodegradable and compostable. There are no animal or petrochemical ingredients in the cups. For use with cold beverages. Pack of 100. Eco Categories: Biodegradable, agriculturally based, less toxic, animal friendly, reuseable.