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A pocket-sized water purifier for any adventure. Toss the SteriPEN® Ultralight UV in your carry-on, backpack or emergency kit so you'll always be able to make clean water. The USB-rechargeable battery is easy to top up from your computer, a wall charger, a solar panel or a car. No buttons, no moving parts – just fill your water bottle from a creek, rain barrel or tap, then submerge the lamp and stir to create clean, potable water.