It might go for the DNA, but remember that it will do nothing to the toxins produced by some bacteria.

The SteriPEN is great for clear water but not water with any particulate. The UV Light will not go through certain particles, thus the harmful bacteria etc can hide in those areas. Ask the company they called the company I use to wwork for and asked about making a filter for them because it did not work if there was any particulate in the water. Something to keep in mind.

They’ve actually got a sediment filter now that fits on nalgene (and with the added tip any) water bottles.

http://steripen.com/steripen_products.html (second product down).

I’ve been using this off and on for a year now, and the speed + lack of chemicals added to the water rocks. Not to mention how light weight it is (well, lighter than a pump filter, but you still can’t beat carrying around iodine tablets).

I’m a big fan, just don’t drop this thing, if you get even a tiny scratch in the glass, it’ll complain about replacing the bulb. Had me boiling water for 3 days haha. But its still a great product, and I went back and bought the backpackers version:

http://steripen.com/steripen_products.html#adventurer

I’ve also met 3 rangers using this on various reserves. While everyone else in the camp site pumped and watched water trickle out, he ended up walking over and sterilizing everyones water for them lol. Great product!