Stearns Outdoors Sun Shower - $24.99

With the compact, easy-to-stow Sun Shower, you can use the power of the sun to enjoy a hot shower at even the most remote, out-of-the-way locations. Simply fill the puncture- and tear-resistant four-ply bag with water and set it in the sun. An innovative TempTracker indicator tells you the internal water temperature. Bag holds up to 4 gallons depending on model, plenty for four or five showers. And it sports a reinforced pipe handle and virtually indestructible double-welded seams. High-impact ABS shower head with adjustable flow control. Mesh carry bag included. Available: 4.0 gallon shower. - $24.99