In this votive plaque depicting elements of the Eleusinian Mysteries, a female figure (top center of rectangular portion) wears a kernos on her head
In the typology of ancient Greek pottery, the kernos (Greek κέρνος or κέρχνος, plural kernoi) is a pottery ring or stone tray to which are attached several small vessels for holding offerings. Its unusual design is described in literary sources, which also list the ritual ingredients it might contain. The kernos was used primarily in the cults of Demeter and Kore, and of Cybele and Attis.
Athenaeus preserves an ancient description of the kernos as
a terracotta vessel with many little bowls stuck on to it. In them there is sage, white poppy heads, wheat, barley, peas (?), vetches (?), pulse, lentils, beans, spelt (?), oats, cakes of compressed fruit, honey, olive oil, wine, milk, and unwashed sheep's wool. When one has carried this vessel, like a liknophoros, he tastes of the contents.
The kernos was carried in procession at the Eleusinian Mysteries atop the head of a priestess, as can be found depicted in art. A lamp was sometimes placed in the middle of a stationary kernos.