That's nice to read.
But in normal use such bottles fall from a sink to a concrete floor, from the roof of a car down onto a street, from a table to the ground from one rock down to the other.
And real military bottles survive such treatment usually.
I also buy my stuff to use it, not to destroy it immediatly. But most of my camping kitchen stuff fell down such a distance in the last years. And most of my bottles fell down such distances too, often full.
That simply happens if you fill it in unknown bath rooms and kitchens at camping grounds and if you aren't always alone. Usually others smash my stuff down, not I myself.
I really would be interested to get informations about what happens if the full bottle falls, let's say 20 times from the roof of a Defender on a concrete plate.
That would be a realistic test for an expensive lightweight item.
A US GI bottle you can throw harder around of course, because it's made for that.
Which pouch do you use for the Keith canteen?