Earth's Natural Alternative Wheat Straw Fiber, Bagasse (Sugarcane) Tree Free 6" x 6" Clam Shell Container, 500/Case Made from unbleached, chlorine free, pesticide free, dye free, natural discarded wheat stalk bagasse (sugarcane fiber) Microwave safe - withstands heat and is liquid/oil resistant. Can be used both with hot and cold foods Contains no plastic or wax lining. Strong and sturdy, durable cut resistant construction Tree-free, Environmentally beneficial, sturdy construction, compostable Material is Gluten Free - made from the plant stalk not grains, which store the proteins and allergens