SteriPEN® is the only portable water purifier that uses ultraviolet (UV) light to destroy waterborne microbes. Whether you are hiking or camping in the woods, or traveling to a foreign country, SteriPEN purifies clear 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.