Steripen Adventurer Opti (Water purifier)

I guess this is becoming a electronic gadgetry blog. This product worked great when augmented with antibacterial wipes.

You fill up a 1 liter Nalgene or water container in the river or stream. Push the button once to purify a liter (quart). When the green light starts flashing, you stick the glass tip into the water up the handle, the UV light turns on (take the lid off first). You swirl the water every once in a while and 90 seconds later, all the bad stuff is dead by the ultraviolet light. I could never figure out how you killed the bacteria and viruses on the rim so I use antibacterial wipes on the rim, threads and inside of the cap of my Nalgene. I used it for 2 days while hiking Segment 3 of the Colorado Trail (http://www.spotadventures.com/trip/view/?trip_id=256318). At 4oz, it is a lot easier to use and a lot lighter than my pump type filters.

I had a little trouble at first, green light turning red. I think it was because I wasn't putting it into the water all the way up to the handle.

You can use the same device to kill the bad stuff in your water in 3rd world countries.