This product is coated with PLA coating inside, made out of plant starch (for a better moisture barrier and fat resistance), and is compostable. It can withstand temperatures from -0.4 to 212 degrees Farenheit. Microwavable (3min at 800W) and oven reheating (up to 212 F). This cup is an ecofriendly approach for your buffet. Soft touch freezing and reheating tolerance make bamboo fiber the perfect natural dish solution. Bamboo is a fast growing plant that renews in just weeks.