Southern Champion Tray lock corner donut trays are suitable for a variety of items, and can be used as a 1-piece tray or a 2-piece box. Each box is made of clay-coated kraft paperboard, and is white on the outside and brown on the inside. Paperboard is thicker and more rigid than paper, is suitable for holding baked goods, and can be recycled or composted. The clay-coated exterior can be printed with a logo or a business name. The lock corners facilitate assembly and enable the box to be folded flat for storage or transport. Southern Champion Tray manufactures paperboard packaging products. The company, founded 1927, is headquartered in Chattanooga, TN.