Steripen Water Purifiers provide easy, lightweight water treatment solutions. SteriPEN® was the first portable water purifier to use ultraviolet (UV) light to destroy waterborne microbes. Whether your source is a woodland brook or an overseas hotel tap, SteriPEN handheld purifiers and safe water systems purify water by destroying viruses, bacteria and protozoa—including Giardia and Cryptosporidium—in seconds. Carry a SteriPEN to disinfect water wherever you travel, hike, camp or trek. It’s the fastest route to pure, safe drinking water anywhere.