Made from unbleached plant fiber, an annually renewable resource & good alternative to petroleum-based containers. Soak proof, freezer safe, & contain no wax or plastic lining. Great for grocery stores, supermarkets, restaurants, cafes, delis, & food trucks with takeout entrees, burgers, sandwiches & more. 100% compostable in two to four months in a commercial composting facility. Gluten free. The tear drop shaped protuberances on the exterior of the clamshell containers are a trademark of World Centric. Food Container Type: Hinged Lid Container; Material(s): Unbleached Plant Fiber; Food Container Material Type: Paper; Color(s): Natural.