Can’t comment on whether the gas-permeable bags would help or hinder the action of the iodine.. but it’s been proposed that we check the resistance of the various bag-type containers to the corrosive effects of the iodine tablets.<br><br>If nobody beats me to it, I thought I might do this sometime in the next few weeks. I thought I’d just dump some Potable Aqua tablets in each container, fill it, and let it sit in the laundry tub for a month or so, checking for failure or visible changes every so often. If nothing happens with that level and duration of exposure, they’ll probably be just fine in real use. It would be really worth knowing if one of these options fails quickly, though.<br><br>I thought I’d do this with one or two flavors of zip-lock bags, the Reynolds oven bags, maybe a condom and maybe a balloon.<br><br>I don’t know how many samples you’re expecting, or what the timing might be, but if you’re interested and it’s convenient, I’d be glad to include them- send me a private message and we can work it out. If there aren’t enough to spare, though, no big deal- just a thought.<br>