Thanks, but… I’ve been told several times, from several sources, that many plastic trash bags have insecticide embedded in the plastic (to keep bugs from chewing in or out), and that because of this they should not be used to store food- apparently it's actually strong enough to contaminate the food and cause illness. That being the case, I’d hesitate to use them for a canteen seal.<br><br>I never had problems with the real US army issue canteens leaking, just with the imitations. It does take some faith in a bottle to go to sleep with it in your bag, outside on a cold night, though. :-)<br>