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Trusted on mountains and trails for over 15 years, SteriPEN® Classic is the best-selling portable UV purifier of all time. Since 1999, hundreds of thousands of people have ensured their drinking water is safe and avoided ruined adventures with SteriPEN® Classic.
Ergonomic design with a new easy-to-remove twist-off cap
The first SteriPEN to be work effectively with alkaline batteries. Can be powered by alkaline, lithium, or NiMH batteries
Enhanced LEDs indicate treatment size and status of batteries and lamp
Watertight. No more worries about dropping your Classic 3 in a bottle or stream
Just activate, place in water, and stir. LED indicators flash to let you know when water is safe to drink
40x40 micron screen fits perfectly on wide-mouth one liter bottles and removes particulates that get in the way of UV light in water