The Nashville Arsenal was acquiring and issuing cedar canteens in late 1861 and early 1862.  These definitely don't make for a pretty canteen, but the wood will quickly start to turn grey and look pretty Reb!  Copied from two original examples, one with an early 1862 provenance, these canteens work well throughout the war for "Western" impressions in particular.

Nashville Arsenal Canteen - Shiloh