This is very simple. You put this metal „can”, „box” without candle into dough and form it. Next you bake it with this metal thing inside. When its ready you take it out from the oven and when its still warm you take out this metal thing from candlestick. When it will be cold it will be hard enough and it won’t change the shape and You can use it many times over and over again :)
Hmm, yep that will work. Thanks for the clarification!