Corrugated Cardboard and paperboard are processed by many companies throughout Wisconsin including Green Bay Packaging Inc., SCA Tissue, Sonoco, and Corenso. In Milwaukee, it is processed by Wisconsin Paperboard. It is also sent to International Paper in Cedar Rapids Iowa, Fibrek Inc. and U.S. Gypsum in Menominee and Otsego MI and to markets in China. Recycled cardboard products include new corrugated cardboard, paperboard containers, notebook backing, brown paper towel as well as cardboard cores and tubes.