I took notice when Doug Hackney saw a Polycomposit camper in Peru and called it his favorite design that fits into a shipping container. Here is more information about the campers and the company that designs them.
Polycomposit is a French firm that uses composite materials to mold campers of all shapes and sizes. The company web site, with models and
current price list, is in French: www.polycomposit.com
Some are designed for smaller vehicles common in Europe (Hi-Lux pickups, VW T5 Transporter cab/chassis, and so on), and others are designed to fit the European light and medium duty 4x4 chassis, such as Land Rover, Iveco, MAN and Unimog chassis. There are lots of interior options, too.
Some Polycomposit designs have a fixed high roof, like a typical USA RV. Others have a pop-up top. Some sit atop a pickup bed, and others are designed to be attached directly to a truck chassis.
Here are a couple of variations on the theme of 4x4 truck, with pop-up roof:
Land Rover 130 double cab
cab-forward medium duty 4x4 (this one definitely won't fit into a container)
and here's the vehicle that Doug saw in Peru
See lots more of Doug's photos of this and other expedition vehicles he
has encountered on his visit to South America here: