I'm guessing that this was invented without a lot of market research.
A beer mat that calls for a refill when the pint is almost empty has been invented by scientists in Germany.
The electronic beer mat was created by computer scientists Andreas Butz of the University of Munich and Michael Schmitz of Saarland University.
I'm not quite sure why it deserves the word "thinking" in it's name. Although the inventors claim is does so much more.
The inventors say the thinking beer mat is also capable of more than just ordering a refill.
It could also for example be used to judge the performance of a karaoke singer or to give an opinion on referee decisions on big-screen matches in sports bars.
A "Yes" vote, for instance, could be registered by raising the glass, causing the sensors to move.
A "No" would be registered by raising the glass and then turning the cardboard mat over and replacing it on the baseplate, thus causing a telltale double movement of the sensors.
My guess is that they were drinking when they invented this thing.