SteriPEN® Classic purifies water using Ultraviolet (UV) light. Whether your source is a clear running brook or a hotel tap, SteriPEN® Classic destroys viruses, bacteria and protozoa, including Giardia and Cryptosporidium, in seconds.
There's no pumping, no chemicals, no filter clogging, and best of all, no after taste. Independent tests have proven that SteriPen® is by far the most effective lightweight purifier on the market - play it say, use a SteriPen®.
The Classic ships with a storage pouch.