This is how I repaired an old Monitor lipstick, on which the top was so badly damaged that it was not repairable and needed to be sliced off. The Lockdown Fairy had brought me a jeweler's doming punch set that was ideal for making the cap. First I annealed the brass rectangle and then formed it using the largest punch that would fit inside the lipstick (11mm) and a matching cup for the 0.8mm thick brass. Then I re-annealed the cap and cut off the excess, and then restamped. After sanding flat the mating surfaces the cap was silver brazed onto the lipstick tube. Then sanded smooth The very top was tapped flat and then centre punched to guide the small drill (thanks @igh371 ). Then the gauze was replaced and the lipstick fitted to the tank Then lit. After an intermediate peen to get the flame correct the stove runs like new. As a bonus, after an extended burn the polish marks have tarnished and darkened and it is difficult to tell that the lipstick has been repaired.