Steripen water purifiers provide clean drinking water from any source in a matter of seconds. These UV water purifiers are fast acting and easy to use. Simply turn on the Steripen portable water purifier, follow the prompts on the screen, and begin stirring up to 1 liter of water with the UV wand. Steripen water purifiers can neutralize up to 99.99% of bacteria, protozoa, and viruses in minutes. Bring this portable water filter when you’re having adventures in the great outdoors or traveling abroad, experiencing new cultures.