As a follow up, I asked which container he would use as a result of his testing. Here's his reply.<br>===========================================<br>I like the Kordon bags and the oven bags- not sure which I like<br>better, I need to play with packing the Kordon bags more.<br>Availability of the "small" oven bags may be an issue, but I bought three boxes.<br><br>The rest pretty much eliminate themselves, I think. I don't trust the zippers of the zip-lock style bags for water- not only do they seem to slowly leak, but I can't imagine resting easy with one in a day pack, for instance. Nor do I like the idea of folding the zippers to get them in a kit- though you could run it around the inside edge of a tin to avoid kinking it, I just don't think it's worth it. <br><br>The balloon just seems impossible to fill without a tap. The condom FEELS very fragile when full, and is very difficult to carry- you can't pick it up by the neck, you must cradle it. It works, sort of, but it's a pain, and not much if any smaller than the others when packed. I also don't anticipate that you'd be able to easily untie it.<br><br>So, it'll probably be oven bags for most of the pocket kits, and I've been carrying one in my wallet for some weeks now without noticing. For the smallest (Altoids size), I might go with the Kordon bag, as the material seems thinner. For anything larger, a vehicle or pack kit, I'd definitely go with the Platypus bottles. I like them better than the military water bags. They're really tough, they don't leak, they fold pretty flat, they stand up when full, and they weigh very little. <br><br>Good stuff.<br>