Custom-manufactured restroom trailers from Advanced Containment Systems have heavy-duty, steel-frame construction approved and certified by the U.S. Army. They come with sloped holding tanks of more than 400 gallons built into the chassis for better drainage. Options include climate control, no-touch flush and sink controls, and quality sound systems. Amenities are offered with many size and layout options, including ADA options. 800/927-2271; www.acsi-us.com.