PrimeWare mini serving trays are made from renewable sugarcane and are biodegradable and compostable. They are are perfect for food, meat, fish, produce and more. These sturdy trays are microwave and freezer safe and are BPI Certified, meet ASTM D6868 Standards for compostability, and FDA Guidelines for food contact surfaces. They are also on the list of Bio-preferred items from USDA.