Adventurer Opti Water Purifier HydroFlask This versatile pack features a

This versatile pack features a hydration reservoir sleeve and zippered slash pocket to securely store essentials

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Adventurer Opti Water Purifier HydroFlask This versatile pack features aBackpacker Editor's Choice 2011. Germicidal UV light destroys viruses, bacteria and protozoa. 8,000 treatments. Purifies 0. 5 L (16 oz.) of water in 48 seconds or 1 L (32 oz.) in 90 seconds. Pocket size rugged purifier weighs only 3. 6 oz. with 2 CR123 batteries (included!). Optical water sensor also serves as integrated LED flashlight. The handy Steripen Adventurer Opti is powered by lithium batteries and can be used to treat 0. 5 or 1. 0L of water.