U.S. Paper Mills, Inc. manufactures lightweight paperboard. The company primarily produces core stock, paperboard, and can stock. Core stock is used for the production of paper tissues and towels. Paperboard and can stock are used for conversion into cores, composite cans and tubes. The company serves to the requirements of tissue and towel industry. The company has manufacturing facilities in De Pere and Manesha, Wisconsin; Oakdale, Minnesota; and Jackson, Illinois. The company was formerly known as Sonoco-U.S. Mills Inc. and changed its name to U.S. Paper Mills Corp. in August 2006. The company is based in De Pere, Wisconsin. U.S. Paper Mills, Inc. operates as a subsidiary of Sonoco Products Co.