Made from plant based PLA compostable plastic. Specially designed for hot beverage cups. Heat resistant up to 200°F. 100% compostable in two to four months in a commercial composting facility. Not microwavable. Fits: 10 oz to 20 oz Cups; Material(s): PLA Compostable Plastic Derived from Plants; Color(s): White; For Use With: World Centric® CUPA12, CUPA16, CUSU10, CUSU12, CUSU16, CUSU20 Cups.