Not realy relevant with the army trangias being so cheap but when iwas a kid a real trangia was way out of my price range and all i could afford was a couple of surplus mess tins. It served me well for years before replacing it with several trangias. It was made from pieces of scrap aluminium and an airgun pellet tin for a burner. The little piece of wire mesh was used with some saw dust to make it into a smoker. Fresh smoked mackerel are pretty hard to beat for lunch when your out fishing.