Omega restroom trailers from AMS Global have a Jets Vacuumerator system that liquefies all waste and paper products, and can either pump to a sewer up to 100 yards away or store on board. They flush using only a pint of water, allowing them to hold a large amount of flushes. The trailers lower to the ground with retractable tongues, and the frame walls are built out of 1 1/2-inch tubular steel with granitized steel floors that won’t decompose or rot. Construction is entirely of steel, composite fiberglass panels and aluminum. The chassis has been tested at over 16,000 pounds capacity. 888/574-4222; www.amsglobal.us.