Saw this in a marine supply store. Looks like an interesting idea. Problem would be refilling it if you don't have access to a pressurized water system.
On a sunny day the black color might heat the water sufficiently for at least a warm wash/shower.
http://www.rinsekit.com/
On a sunny day the black color might heat the water sufficiently for at least a warm wash/shower.
http://www.rinsekit.com/