The VIP from NuConcepts is built using extruded aluminum structural elements, polyethylene walls and sun strong fiberglass doors. It is solar-powered and self-contained; it has a flushable porcelain toilet, sink with auto-off faucet, LED interior lights, exterior in-use light, power roof vent, acrylic mirror and roto-cast tanks. Options include air conditioning (requiring 110 volts), interior heating, winterizing package, water heater, city water connections, dump valves and an upgraded countertop. 800-334-1065; www.nuconcepts.com.