Yes if it was say a mason jar, that would work. However, when the suction is sufficient, it actually will draw a stopper into the neck of the canteen, deeper than most folks would ever shove it. Now, an inexpensive canteen might have had a weak seam on the neck, which might have split and thus relieved the pressure, but this was well made.
So as you heat such a container, you not only have to relieve the pressure, you also have to overcome the friction. You have no real way to tell the pressure is good, so it's ok to pull on the stopper. I suppose you could dent the canteen and hope you have time between when the dent pops out and the stopper gets launched, or launching the stopper might be the idea and you could hope that the steam would build up and launch the stopper before you ruptured a seam.... :shake:
... or you could be sure not to destroy a rather expensive item, and then use a small toggle bolt and extract the hardwood stopper. He uses cork now. :grin:
That doesn't work on the East Coast when we have 90% humidity and higher. The speed of the evaporation is so slow, it doesn't change water temp. Comes out nice and warm. :shocked2:
LD
