SteriPEN Classic Water Purifier Sppf-Rp - $52.88

The innovative Steri-Pen uses ultraviolet light to purify drinking water in less than a minute. Simply dip the UV lamp into a 16-oz. container of water and gently stir. A liquid sensor activates the lamp and an internal computer calculates dose. No bulky filters or unpleasant chemicals. Kills more than 99.9% of bacteria, viruses and protozoa, including cryptosporidium and giardia. Weighs 5.4 oz. with batteries. Measures just 7 x 1.5 x 1.6 . Matches with most commercial water bottles. Four AA batteries (not included) will power through 200 16-oz. water treatments. - $52.88