Solar-heated portable outdoor shower

A solar-powered outdoor shower capable of heating 5.5 gallons of water to a toasty 140 degrees Fahrenheit in just two hours on a sunny day? Uh, okay. The solar-powered outdoor shower is also easily transportable, too, which is good because even though the manufacturer claims it can still heat the water on hot cloudy days without direct sunshine you might want to relocate your beach party to brighter climes.