The Pro-Pumper 250 low-profile, plastic holding tank from Kentucky Tank is designed for above-ground waste storage. It has a capacity of 250 gallons and easily fits under office trailers. It has seven 3-inch threaded inlets and a 10-inch lid with stainless steel tether for easy plumbing and pumping. The holding tank has a molded-in handle for easy positioning and securing. It is FDA approved for potable water. It comes in 16 colors. 888/459-8265; www.kentuckytank.com.