M31 canteen marked MN 40

Nice early 1940 dated M31 canteen in good used condition. The aluminium flask itself is nicely marked MN 40 which indicates production by Menesa Metallindustrie GmbH. Neunkirchen-Saar in 1940. The cup is  MPD coded 1W/S which indicates production by Julius Posselt, Gablonz an der Neisse, Reichsgau Sudetenland and the usage of Phenolic resin (bakelite) with sawdust as the filler material. Nice early exmample in good used condition!