Below is a list of Blow Molding manufacturers from St. Charles, Missouri. Blow molding is a popular plastic molding process that produces hollow, thin-walled containers and offers high-cost efficiency, long run capacity and application versatility. Blow molders manufacture many different products, including toys, blow molded cases, sports equipment, garbage cans, planters, and most commonly, blow molded containers like plastic bottles that hold many beverages including water, milk, juices, carbonated soda, liquor, beer and other foods like peanut butter and cooking oil.