Ok, so this isn't exactly a mind boggling new concept, but I'll hand it to the designer Samuel Rock that he's probably the only smart guy who pitched the idea to some big company willing to fund this... Idea of his.

Now, what he came up with was a 6 liter jug placed in a briefcase made out of a scratch-resistant material which disinfects water via UV filtration and then named it SODIS! No, I'm not kidding. That's really just it.

Source: Yanko Design