These trailers and campers are made by Livinlite. Practically everything is aluminum from the frame, the floor, the outer skin, and most of the interior including the doors. A composite material is used for the counter tops, cabinets, and door facings. Very green, too!
As for the appearance, you can leave the exterior silver, or you can have it painted in a wide range of colors.
Anyhow, thought I'd pass this on for those who hadn't heard about this company. I'm seriously thinking about getting a truck camper for boondocking in those hard to reach spots.
Here's their homepage: LivinLite All Aluminum Ultra Light Campers, Ultralight Campers, Lightweight Campers, Ultra-Lightweight Campers