Thanks to Bill and Presumed for the tests and results!<br><br>>>most folks in a survivial situation are not going to let the water sit in the container for two weeks straight. They're going to be drinking it up! :-) <<<br><br>That's true. I still find the long-term test very interesting. If I were in a situation where I was refilling the containers repeatedly over the course of many days or weeks (and treating the water each time), that could result in a long-term exposure of the container to the iodine. Great information.