Pump-up Solar Shower. purchase sprayer, paint it flat-black, and replace the mister head with a shower head!
GoSun Stove: Fast, Portable and Practical Solar Cooker
29 Insanely Clever Products That Will Make You Want To Go Camping
All this will sustain a hiker on the Appalachian Trail for about five days and, with empty water bottles, weighs about 25 pounds.