Fresh from this year's Outdoor Retailer expo comes SteriPEN's new Sidewinder portable water purifier. You can leave the batteries at home on your next trip, as the Sidewinder only needs a good cranking to power its germ-killing UV bulb.

The purifier can take a liter's worth of water at a time, and will alert you with a green LED once you can stop cranking and start quenching yourself, pathogen-free. Look for the Sidewinder to hit shelves in September for $99.95. [Gear Junkie]