>>217137>What are the advantages, if any, of a metal canteen over the more modern stainless steel (or other metal) water bottles?The shape, which for many is designed to fit inside a cooking pot, as an example:
http://www.thepathfinderstore.com/canteen-cooking-set/Cooking pots now come filled with their own stuff, like salt/pepper, cups, flatware and stuff, so canteens kinda disappeared.
They're also mostly designed to take as little space as possible, and to be worn on a harness, not in a backpack, so it had to be compact. In a way, the "bottle" shape is stupid, there isn't much logic behind it.
Though most modern steel bottles perfectly fit most models of steel cups.
Then there's the steel, modern ones have "cleaner" steels, though that also concerns "modern canteens". Old canteens are not dangerous either, but you'd be better off with a more recent one.
That's about it I guess. Also they're not necessarily thinner or lighter; well, a bit for some, but most are actually just as thick. I'm currently compiling data on all steel bottles available, mostly when it comes to thickness, some are so thin they break when they fall, which is obviously bad. Thanks for your contribution, I didn't knew about the Purica Steel brand.