To bring this thread up to date with subsequent research I report that more current information indicates that the Philadelphia Depot of Supplies (DQP) obtained funding for equipment to manufacture canteens in fiscal year 1918. Other documents indicate that it is probable DQP didn't produce canteens or canteen cups until post-1918. Documentation indicates that the machinery to manufacture canteens and canteen cups was disposed of by 1930, so the the production years at DQP was ca. 1918 - 1929. A distinctive cap design has tentatively been identified as DQP production and is the only known difference from Canteen M1910.

It is known from documentation that the Marine Corps started acquisition of Canteen M1910 and Canteen Cup M1910 from the Army in 1913. As a consequence canteen covers identical to Canteen Cover (Dismounted) M1910 were probably manufactured by either Rock Island Arsenal or DQP in 1913. The first Canteen Cover identified as manufactured by DQP are identical to Canteen Cover (Dismounted) M1910 was dated 1914. Thereafter the Depot continued to manufacture various patterns of canteen covers through 1945.

The canteen covers manufactured 1913-1917 featured "eagle cap" socket-and-stud snap fasteners that were decorated with the Marine Corps uniform button design. The location of the double belt hook at the top of the body was first assembled in 1915. The change to the "Lift-the-Dot" socket-and-stud snap fastener probably occurred in 1917. The color of the duck and web material went through several changes: The canteen covers thought to have been manufactured in 1913 were olive-drab and featured a large printed U.S.iconM.C. Subsequent canteen covers the U.S.M.C. was omitted from the exterior body. The canteen covers manufactured in 1914 were a darker shade of olive-drab. In 1915-16 the duck was changed to olive-green with contrasting olive-drab webbing. In 1917 the colors of the materials was changed to olive-drab in a lighter shade that is often described as "mustard yellow."

It is probable that by the expansion in 1941 that canteens and cups manufactured by DQP had been issued and in use by "old-breed" Marines. Documentation in the textual records of the Commandant of the Marine Corps and the Quartermaster General of the Army demonstrate that the Marine Corps decided not to manufacture canteens and expected to obtain sufficient supply from the Army. The Marines received all the canteen types manufactured on QMC contracts. Of special note the CMC ordered that the Canteen M-1942 was not to be issued to FMF (combat) units, and issued to training and non-FMF units exclusively. The Marine Corps adopted the Canteen Corrosion Resisting Steel as standard and requested that canteen on subsequent requisitions from the Army QMC. All of these canteens were replaced by Canteen Plastic 1-quart.