During the Early Corinthian period, there seem to have been workshops specializing in aryballoi decorated with komasts. These dancers performed in observances dedicated to the god Dionysos. However, on vases that were produced in quantity, such as this one, it is likely that the iconography is conventional rather than significant in any specific sense.
Said to be from Tarquinia
Metzger, Henri. 1951. Les représentations dans la céramique attique du IVe siècle. p. 62, fig. 29, Paris: E. de Boccard.
Richter, Gisela M. A. 1953. Handbook of the Greek Collection. p. 37, Cambridge, Mass.: Harvard University Press.
Mertens, Joan R. 2010. How to Read Greek Vases. p. 62, fig. 29, New York: The Metropolitan Museum of Art.