That is an excellent example of the tin (tinned iron) drum canteen created with just one side flat and the opposite convex. In this instance the convex side has an extra step up, rendering it only a tad a lot more… https://jayuqbf390542.blogtov.com/9195881/helping-the-others-realize-the-advantages-of-white-overlap-tank-top-and-flare-pants