I remeber that conversation well. I may still never come to a solid decision about urban water purification carry though I can (obviously) come up with lots of good reasons for it. <img src="/images/graemlins/wink.gif" alt="" /> If we could get puritabs here in the states I would probably carry water purifaction a lot more often. Those things are tiny. Do bad we can't get them here. <img src="/images/graemlins/frown.gif" alt="" />