Today I learned that when two things are stuck together by pure force, heating things up or cooling things down do not always end up successful. While the usage of a “mugscrewer” (as in “corkscrew” but for mugs), at least in this particular situation solved the problem. By slowing using raw power to get the two mugs from each other.
I learned about it by watching, yet another time, the “Sendung mit der Maus”. The problem was the following: Two mugs that got stuck together were send to them to ask them how one can get them apart from each other again (obviously without destroying them). It was a big coffee mug, which head an espresso mug stuck inside. You can watch the full episode yourself on the official Maus website.