These 4 ounce sample cups are made of sugar cane fiber that is a by-product of the sugar refining process. The cups are unbleached and do not have any coating, so that they are biodegradable and compostable. They can be used for hot or cold foods, and are thick and sturdy, microwaveable, freezer safe, oil resistant and capable of handling boiling water. Natural color. Pack of 50. Made in China. Eco Categories: Recycled, biodegradable, agriculturally based, less toxic.