Depending on your point of view.
What is a so-called Klöpper head? The answer comes from the physics of pressurised vessels. The Klöpper head is a derivation of the ideal form for the ends of pressurised vessels: the hemisphere. It is flanged and dished and has a relatively high resistance against pressure. The somewhat egg-shaped form was invented by a German engineer, Georg Kloppsch, and therefore named "Klöpperboden" in German. But, the story aside, you can also just take such a "dish" and convert it. What previously withstood pressure from inside now curves upwards, forming a bowl. We now have a vessel, but for what? Let’s just keep it empty for now and put in the thoughts that appear just looking at its form and musing about function, material and manufacturer. Guess what: we have imperceptibly started to contemplate and meditate.