These 2 ounce, 3 ounce and 4 ounce plastic sample cup 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. Reuseable. For use with cold/lukewarm foods (up to about 110 degrees). Pack of 100. Same lid for all 3 cups. Eco Categories: Biodegradable, agriculturally based, less toxic, reuseable.