Outdoor showers are just better than indoor ones. Of course, the best kinds are attached to your house so that they can provide heated water. But that doesn't work for everyone, especially if you're not going to use it all the time. The Screw outdoor shower is a good solution for really hot days when you're working in the garden or rolling around in the dirt. Just hook up your garden hose, and you get a beautifully-designed, portable outdoor shower.
What's that, the Screw costs $830? On second thought, putting your thumb over a hose so it sprays is probably a better plan.