In business since 1895, Calpine Containers Inc. focuses on agricultural packaging catering to California's growers, packers and shippers. Based in El Centro, Calif., the company offers products, which include corrugated, plastic and wooden shipping containers and bulk bins. Consumer and inner packaging items comprise trays, clamshells, pads, bags, bands, and boxes. It also handles unitizing material, such as pallets, cornerboards, straps, film and sheets. Calpine Containers Inc. also offers a variety of services that range from machinery supply and maintenance, inventory management and product sourcing. The company offers structural and graphic design as well.