These approximately 6 1/2" L x 4 1/4" W x 1 3/4" H hinged lid containers are clear and look like their plastic counterparts, but are made from polylactic acid (PLA), which is made from agricultural crops such as corn and potatoes and are fully biodegradable and compostable. There are no animal or petrochemical ingredients in the containers. These crops are not guaranteed to be gmo-free. These hinged lid containers are locking, unlike the other 3 in this series. Reuseable. For use with warm/cold foods (ie, up to about 110 degrees). 50/pack. Eco Categories: Biodegradable, agriculturally based, less toxic, animal friendly, reuseable.