"What Is It?" LARGER SIZE 18 Ounce, Reusable Red Melamine Cups / Glasses, Set of 4 Includes a set of 4 cups - Red Made of Melamine which is washable and reusable. Made to look like traditional plastic cups but they are not plastic. Dishwasher safe. Not microwaveable Capacity: 18 ounces Also available in a 15 ounce size