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SteriPEN Traveler

Salmonella, streptococcus and cryptosporidium -- these exotic-sounding inhabitants of unsafe drinking water can play havoc on your digestive system and turn a vacation into a nightmare. Keep them from tagging along on your travels with an effective water purification system. The SteriPEN Traveler uses ultraviolet light to deactivate germs in almost any water. It uses four AA lithium batteries and fits into most commercial water bottles. The SteriPEN takes less than a minute purify a bottle of water and retails for about $50.

The device is ideal for those days you stop your car to take a hike, especially in hot weather. As long as there are water sources along the way, you won't have to bring bottles of water for each hiker. And the SteriPEN, at 3.6 ounces (102 grams), is lighter and less bulky than most filters.

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