Made from renewable plant fibers – bagasse (from sugarcane) and wheatstraw (the stalks, not the grain that causes allergic reactions), this bowl is compostable and can be used for both hot and cold items (Can tolerate hot liquids up to 220 degrees F°). It is microwave and freezer safe as well as soak proof with no plastic or wax lining. It meets ASTM D-6400 standard for compostability and meets FDA standards for food contact. Gluten-Free.