The stirrup jar is a distinctive form of storage vessel that was produced in large quantities in late Bronze Age Greece. It takes its name from the shape formed around the false neck by the handles. The small neck suggests that it was designed to hold valuable liquids, particularly oil, which had to be poured out carefully.
Literature: J. Falconer and T. Mannack, Corpus Vasorum Antiquorum: Great Britain, Fascicule 19: Winchester College (Oxford, 2002), p. 23, plate 16.13-14