Established in 1969, Pioneer Container Corp. offers multiwall paper bags. Based in North Kansas City, Mo., the company specializes in sewn-open-mouth and pinch bottom bags for a range of products, including feeds, seeds, beans, rice, popcorns and flours, among others. It offers an array of products, including sewn-open-mouth (SOM) bags, pinch bottom (PBOM) bags and self-opening-style (SOS) paper bags. Pioneer Container Corp. provides various types of papers in a wide range of sizes and types, including natural kraft, bleached kraft, high performance natural and high performance bleached paper.