I picked up this brass bowl recently and I have no clue as to its function or even if it is military. It is marked "M.M.S. ~ 1940", which means it was made by Midland Metal Spinning Company, Limited of Wolverhampton, I think. It lacks a broad arrow, but the date might imply military use. The aluminium waterbottle is shown for comparison of the stamps
Any ideas about this item??