Reproduction, Aluminum US Canteen and Cup. These are decent reproductions but not perfect. When compared to an original these bottles are about a 1/2 inch shorter, the shoulders of the bottle are slightly steeper and the cap tapers a little. The cup is a tight fit on an original canteen and the bottle is a little loose inside an original cup. Due to the fact they these are slightly smaller than originals you will need to stuff something inside the bottom of the cover for the cap to stick out the top.