This is a cool gadget used to purify water.
SteriPEN™ is the only portable water purifier that uses ultraviolet (UV) light to destroy waterborne microbes.
Whether your source is a woodland brook or an overseas hotel tap, 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.
More info via the manufacturer Hydro-Pothon here.
Available at Amazon.