I was wondering if the Brit bottle is fatter than the US 1 quart bottle please .
What Gareth said. The Osprey is also much more rigidly made and robust, the seals are far superior on the Osprey too. I've dropped my US canteen and put a split in it when climbing in St Ives. That wouldn't have happened with an Osprey.
While I agree the Osprey is a superior product, I find the genuine issue US Quart pretty sturdy.. the plastic on mine is almost as rigid as the Brit one, can't see how it could split..... However, I much prefer the wider opening and larger capacity of the Brit model.... Its a bit like the cups.. the Crusader is far better than the US quart cup for cooking outdoors. I'd say the main point I like about the US set is the canteen cover...
That said both serve their purpose well...
cheers
Gareth
just that i had got myself an eagle industries canteen pouch which is said to fit both ,I have an osprey in it and it is TIGHT.