If one set it in the sun, would it get warm enough for a shower? How about a black plastic drape over the top to help with warming?
Well, the solar
shower bags I've seen were much smaller, no more than two gallons. I can't imagine this container would collect enough sun to really heat this much H2O in a day. Then would come the task of lifting it over your head for the showering. Water weighs about 8 pounds per gallon, so this container, full, weighs about 65 lbs. I think it would be much more handy on the wheels.