Green urea resin (bakelite) canteen cup

Excellent and very rare green coloured urea resin M31/M42 canteen cup. Based on the condition I would say that this is a ground dug example which has affected the marking as well but can still be deciphered to MPD code 1W/K which indicates production by Julius Posselt, Gablonz an der Neisse, Reichsgau Sudetenland and that the used material is Urea resin (a certain type of bakelite) with an organic filler material. Very rare cup in ground dug condition!