This is a wonderful solution to a non-existent problem. I cannot ever recall having to put any kind of canteen in or near the fire or even considering doing such a thing. If I have a metal cup that fits around my water bottle (last time I looked, I had four, three SS and one ti) why would I ever want to heat up my water bottle in stead of using my metal cup? On a normal trip, I usually have some sort of larger metal pot, as well.