Paul,

I have used p38 openers in the military for 20 years and never ever thought of them as a survival tool.

I get the feeling people these days have this mortal fear of water being poisoned.
Yes, I do own and use filters and use iodine tabs. But I remember a day when we would dip the mug into the water of a well used lake full of pollutants and never got sick.

Remember to always drink purified or not. Deal with the consequences later if any. Makes you wonder if our lifestyles are so sterile that our bodies have lost the ability to fight common illnesses caused buy questionable water.

Again, the Indians drank giardia and crypto laced water and thrived long before iodine, Mexicans today eat tainted food their entire lives with no ill effect. Why? Because their bodies are tollerant to such bugs, we used to have this tollerance. Another argument for banning antibacterial soap, our stomachs are getting soft in this modern sterile society.

Mike