Shipping containers are finding new life in all sorts of projects outside of simple storage, for instance in urban farming. Simple, built to human proportions and with a lot of structural integrity, a shipping container is capable of far more than just containing. A company called MODS international has created a livable unit inside a shipping container that anyone can simply order on Amazon.
The units are not built from recycled containers, but brand spanking new ones, so you don't have to worry too much about what was inside your house before. They include a kitchen, small living area, bathroom, and a bedroom that can sleep up to four with bunk beds. But they are, of course, fully customizable, with added windows and double doors to allow light inside and expand the space.