Calumet Carton is a family-owned manufacturer of mailers and folding cartons in the US, serving customers from coast to coast for over 85 years. Calumet Carton is a leader in packaging design and innovation, and is widely known as the inventor of the Stayflats® Mailers. Calumet carries a full stock line, and also provides custom printed mailers and cartons, serving a wide variety of industries. (less)