These 4 ounce plastic sample cups 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. Lids available. Eco Categories: Biodegradable, agriculturally based, less toxic, reuseable.