James9 ... do you have a link for that - the lifesaver bottle?
littleWoman - i didn't know that iodine tabs were hard to come by in Europe. interesting. i fought a battle trying to get people to drink water that had been purified by them - and lost. i tried changing the taste by adding stuff like powdered orange juice flavors (in the US we call it Tang). the result was a disgusting mixture of crummy orange juice and iodine. it tasted awful.
in the end i learned a simple lesson. we are really spoiled in the West by having ample supplies of clean, drinkable water. many people in third world countries will never have that privilege. unfortuantely, it's not easy to get normal people (or clients) to drink water that tastes bad - even though there are no health risks (i.e. it's already been sterilizied in some way). the only sterilization that works and keeps people happy - is boiling. but that takes time and fuel. otherwise most normal people just do not have the personal discipline to drink enough "bad" water to keep their body going. that was my experience
KL