Mobile liquid storage tanks from C&E Plastics are made out of polypropylene, a corrosion-resistant, extremely durable and long-lasting plastic. They are inherently well insulated and come standard with 23-inch manways for ease of use. A smooth interior design and sloped floors for easy cleaning are incorporated. The encapsulated steel corrugation of the outside walls prevents any weakness in structure. Custom designs are available to meet unique specifications. 724/947-4949; www.ceplastics.com.