Thank you for the link, Manu. I have a few concerns:
1)As a family of 5 will have to buy 5 and each one will last 1 year for adults and 2 years for the children, which means we have a year to sort out clean water supplies whithin a year (more or less), if something was to happen. I agree that a year with clean water is better than nothing, but it doesn't make it a permanent help.
2)I was reading reviews online and a few people commented on a strong intial surge of iodine.
3)Doesn't remove Giardia, which makes it a bit questionable. Giardia is a protozoic parasite which can cause Giardiasis, an infection of the lower intestines which doesn't kill you but the vomit and diarreah it produces can lead to sever dehydration, malabsorption and weight loss and this could be dangerous if we have to live without hospitals.
The makers offer extensive facts and information on their website if you have a look at this link http://www.lifestraw.com.au/page/LifeSt ... efault.asp
you may find there is also a "family" lifestraw available which is more suited to the base camp, the straw is perfect for its application, as you mentioned if something was to happen I think "permanent" will be erased from the dictionary, the Lifestraw is instant, effective and most of all simple to use and maintain for the young and old alike. I am led to believe, it does remove Giardia aswell, you can d/load their PDF follow the links, research as much as you can!!! thanks for the comment