Large medical canteen marked CFL35

Textbook pre war large 1L canteen or Labeflasche in complete matching and unissued condition. All the parts (flask, harness, cap, hook, cup and cover) of the canteen are nicely marked CFL 35 which indicates production by Carl Feldhaus Aluminium-und Metallwerke, Lüdenscheid in 1935. The canteen is a typical early example with high quality materials in near mint condition!