The Flat Vacuum Tank from Crescent Tank helps one vehicle serve as a service, pickup and delivery truck. It is sized from 300 to 1,000 gallons and can carry up to 10 portable units and equipment needed for the job on the bed. Waste is held inside the truck bed, and freshwater is held in the poly tank to avoid contamination. The vacuum tank is constructed from 1/4-inch mild steel. No baffles are needed, allowing the waste to empty completely and helping avoid corrosion of the interior of the tank. 585/657-4104; www.crescenttank.com.