WW1 period made circa 1914-18 year steel canteen

WW1 period made circa 1914-18 year steel canteen. Marked - "Warshaw", in Russian, and also marked with eagle and dated 191?, the last digit is invisible, but we are close to think about 1914 year of production. Very rare war time issue. Interesting type of ceramic cork took from the beer bottle. Most ww1 canteens we saw were aluminum made, but this one is steel and that is rare.