A second thought just came to me, tying your post to an earlier thread regarding the effectiveness of potasium permanganate in one's PSK. <br><br>In a wilderness situation, sterile water is not likely to be readily available, but there are a few options.<br><br>1. Untreated drinking water from a water bottle, perhaps from a well.<br>2. Treated water with potasium permanganate<br>3. treated water with iodine (potable Aqua)<br>4. Treated water with Chlorine tablets.<br>5. Betatdine wipes.<br><br>Given these options how would you rank them in order of preference? Or which, if any, would strike fro the list completely?