Made form leftover agricultural fiber 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) Our plant fiber based products are now made from wheatstraw fiber. Wheatstraw is not only an annually renewable resource; but can also be turned into products normally made from plastic or paper. Wheatstraw is the remaining plant material after the wheat grain and chaff have been extracted. We use these byproducts to make compostable tableware. Though these compostable bowls are soak proof; hot items will cause the plates to perspire and some condensation will form at the bottom. We also offer lids for our plant fiber bowls but they fit loosely. Therefore; using the bowls with lids for take out is not recommended for hot liquid foods. 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.