The stream you’re hiking next to looks so refreshing, especially since your water bottle is bone-dry, but you have no idea what kind of creepy crawlies are living in that water. Camelbak’s All Clear Microbiological UV Water Purifier enables UV rays to zap bacteria in a minute. Screw the cap in, hold the power button down and rotate the bottle while the rays zap more than 99 percent of bacteria, viruses and protozoa.