Vintage canteen, 1918 patent

Vintage / antique canteen in VERY WORN CONDITION, please see photos. No strap, no cover. Faded/deteriorated black paint. Uneven/flattened feet. Functional screw-cap. Dents and discoloration throughout. Dusty in places, needs a deep cleaning. “Patented // October 15, 1918” stamped on top. Possible military use.