I don't usually post but can't let this pass.
Look at the Purell label. Alcohol. 99.9% of "Germs."
What happened to 6 log, 4 log, 3 log kills for bacteria, virus, giardia. Purell very risky at best. If you want to save money, just bring some isopropyl alcohol, no need to get Purell. Stay light, find one product for all!
I have been ill in the field in remote area. Bad experience. Now I just buy the best available. Spending 13 bucks to save my trip is well worth it. I have used KW for wounds. It burned a bit but worked well. Cleaned wound, applied band aid, applied KW through the holes. Never had a shelf life issue but I keep in the bottle in the glass/plastic container. Plan to buy the Dr. RJ recommended droppers. One more note. I have read that those so-called chlorine dioxide pills do not work on bacteria in film where most bacteria are anyway. Anyone know about this.