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I don't know a lot of those canteens, though I should read up more on them as I always liked them. Like with anything it all comes down to time and place. What little I know of those, is that one in a museum somewhere is provenanced to a Federal who took it as a souvenir at Port Hudson.
I honestly don't know any more for sure, but if I were to guess based on that little bit, I'd say this canteen probably was issued in Mississippi and Louisiana and thus only correct to those areas before 1863 at least. I
think I've seen somewhere of one provenanced to the Battle of Shiloh, so there's that. So going by that its not period correct for the Army of Northern Virginia or Army of Tennessee. Just Army of Mississippi, and maybe, just
maybe some limited use in the Trans-Mississippi.
(On Trans-Miss. and Miss. areas Confederate uniform and accoutrement wise, I've always loved to say "We got the good stuff! ANV and AoT ain't got near the cool uniforms and gear!" which is ironic as can be as we're the forgotten and neglected Confederates reenacting wise.)