The American winners of a design competition for a portable
solar charger display pavilion launched by Volvo Italia came up with this, throwing in a solar charger:
Beautiful? Without a shadow of doubt. Practical? At first sight it looks not. But replace the car with a Hummer and the background with a US Army encampment in Afghanistan, and you think, something like this could become the solar jerrycan.
Update: first paragraph amended in response to niggles of commenters rather missing the point IMHO.