The term 'Cup Material' can refer to two different materials: TIN (3 letters) and Styrofoam (9 letters). TIN is a malleable metal that has been used for centuries to make items such as cups, plates, and utensils. It is also used in the production of cans and other containers. Styrofoam is a lightweight plastic foam material that is often used to make disposable cups and other food containers. It is also used for insulation and packaging materials.