Anybody use Aquamira drops to treat water? I just picked up a pack as a compact, simple alternative to my Pur Hiker filter. It is chlorine dioxide and comes in a set of two small bottles. To make it work, you combine seven drops from each bottle, let it react for five minutes, and then add the solution to one liter of water for 15 to 30 minutes. I have not tried it, but it claims to have no bad taste and a shelf life of four years.