With respect to Samos’ local tradition we have pushed forward “dikaia koupa” or “Pythagoras’ cup” and made it known as a characteristic product of Greek ceramics. Today we dispose of “dikaia koupa” all over Greece and in the market abroad. the function of “dikaia koupa” is based on the principles of Pythagoras’ hydraulics. Tradition says Pythagoras, during water supply works in Samos, around 530b.C.. moderated the workers wine drinking by investing the “fair cup”. When the wine surpasses the line, the cup totally empties, so the greedy one is punished.