These World Centric® compostable clear hinged clamshell containers are made from PLA, which is derived from plants. Even though these clamshells are as light and strong as plastic, they fully break down when composted. These takeout containers are compostable, eco-friendly, freezer safe, and suitable for cold foods. Great for delis, concession stands, food trucks, takeout restaurants, and cafes. Composts in 2 to 4 months in a commercial composting facility. Not microwavable. PLA products should be stored in a cool place below 110° F and out of direct sunlight.