This 7 Ounce Stacking Cup (ML9011I) from Thunder Group is made of melamine, a material known in the foodservice industry for its durability and resemblance to real china. This stacking cup is a part of Thunder Group's Western Melamine Color Ivory Collection. This stacking cup is creamy off white and it is made of break-resistant melamine. Melamine is preferred by the foodservice industry because of its superior strength and high heat-resistance. While not recommended for microwave use, melamine can withstand temperatures as high at 220F and as low as 32F, and is commercial dishwasher safe. Melamine is also non-toxic and resists breaking under the daily abuse of use in commercial foodservice. This product is sold by the case of 12.