The lid for the German flask model 1931 of black synthetic resin.
The appearance of resin lids was obviously connected with the reform of 1940, when a number of simplifications were made in the uniform and equipment of the German army. And this model has been dating since 1942. Probably, the Germans changed the design to a simpler (in terms of manufacturing) and more comfortable (with large ribs).
Our replica is also made of synthetic resin (the composition may be different). Price per set: cap, red rubber gasket (type with a hole in the middle) and peg (rivet).