A great invention that even works. Admittedly, the one or the other mess it has already given. This is due to the egg quality. Cheap discounter eggs often have a very thin skin, because you can then before pulling the ball a little too high. Then it makes gossip and the yolk running. Meanwhile, however, we have to get out all the sheets and have perfectly "decapitated" eggs without nasty shell crumbs in the yolk.