The Dionysus Cup is the modern name for one of the best known works of ancient Greek vase painting, a kylix (drinking cup) dating to 540–530 BC. It is one of the masterpieces of the Attic Black-figure potter Exekias and one of the most significant works in the Staatliche Antikensammlungen in Munich.
The cup is 13.6 cm high and has a diameter of 30.5 cm. It is complete and composed of only a few large sherds. The inside image, the tondo, takes up almost the entire interior of the cup. In the centre, a sailing ship is depicted, travelling from right to left. The prow of the ship is decorated like an animal's head, while the rudder is clearly discernable at the rear. Within the ship is a well over life sized figure, the god Dionysus. The sail, unlike the rest of the image, is painted white, a common stylistic element in the black figure style. Vines grow from the mast, with three large clusters of grapes on the right and four on the left. Dolphins swim below the ship—two towards the right, three towards the left—and a further dolphin is found on the right and the left hand sides of it. Although this is not realistic perspective, it could indicate that the dolphins are swimming around the ship. Like the vine, dolphins are symbols of Dionysos. In addition to this broad outline of the image, there are many detailed features. Two small dolphins are incised on the side of the ship. The long-haired, bearded god wears an ivy crown and holds a cornucopia in his hand. His tunic bears a fine pattern. On the outside, around each of the handles, six warriors stand over a corpse. The space between the handles is decorated with a stylised face with large eyes and a small nose.
Two meanings have been suggested for the interior image. Most common is the suggestion that is a reference to the seventh Homeric Hymn, in which it is explained how Dionysus was kidnapped by Etruscan pirates, who were unaware of his identity. The god confuses their thoughts and causes them to jump into the water, where they transform into dolphins. A second possibility is that the arrival of Dionysus at the Athenian Anthesteria is depicted. The images around the handles probably depict the battles for the corpses of Patroclus and Achilles, with the naked corpse being Patroclus.