Peli Cases are fully adaptable and can be used for more than just storage... One interesting use we recently came across, was the creation of a portable classroom. A fully functioning classroom suite, allowing portable learning and teaching at any location, regardless of infrastructure.
Not only is the whole project self contained and self-powered, but it also has a built-in LCD display and LED projector, meaning it can be used to teach large groups. It's specifically designed with refugee camps, rural areas and developing nations in mind.
To see more on how they create portable classrooms, take a look at the Hackaday project.