Don't listen to me when I say that I took this product on 40 Himalayan treks and expeditions--and it was invaluable. Listen to the medical article in Lancet that says that this is the best form of wilderness and third world water purification available. The iodine drops run out. The purification pumps are easy to mis-usue, so you get one drop of dirty water in the pure water-- thus defeating the p
This review was written in the old system and had content requirements that are different than reviews written today.