This bowl punishes the user if he is too greedy (3 photos + 1 video)

The cup of Pythagoras or the cup of Tantalus is a vessel that obliges user to drink moderately. This invention attributed to Pythagoras, allows you to fill the glass to a certain level, and as soon as this the limit is exceeded, the liquid is completely poured out.





In the center of the cup is a cylindrical structure with a hole that communicates the inner region with its outer grounds. When someone fills the bowl, the pipeline also fills up. However, following Pascal's principle of communicating vessels, when the level liquid exceeds the inflection point of the pipeline, the bowl is emptied.

What happens in this situation is that hydrostatic pressure - that which occurs inside liquids under by the action of the liquid's own weight - creates a siphon that pumps out liquid through a hole in the base of the glass.



As the liquid level in the cup rises, air pressure also pushes fluid into the inner tube. After a certain level, the liquid passes the edge of the innermost tube and starts to flow. After the formation of a vacuum, the escaping liquid creates suction, spilling the entire cup.

Allegedly, Pythagoras invented this bowl for people who worked on the island of Samos and drank a lot of wine to teach them not to be greedy. Therefore, if a worker tried to fill the cup, and the wine exceeded the measure, the cup was completely emptied, punishing the greedy, who lost all his wine.



So if you have a friend who is a bit greedy when it comes to drinking, give him one of these.