Our 9 x 9″, single compartment compostable clamshells are microwave and freezer safe, can be used for both hot and cold items, soak proof, have no plastic or wax lining, handle hot liquids up to 220 Fahrenheit (moisture forms at the bottom for hot food items), fully compostable, sturdy and strong, meet ASTM D-6400 standard for compostability. Though these compostable clamshells are soak proof, hot items will cause the plates to “perspire” and some condensation will form at the bottom. Our products meet FDA standards for food contact and are Gluten-Free. They are made from the wheat stalks and not from the food grain, which stores the proteins and allergens.