κιούπι/ kioupi means
Large handmade clay pot with spout, a round body and thick walls which was used to store dry or liquid products and food. Its shape was the same as that of a “pithari” (Ancient Greek “Pithos”), with the difference being the spout of the neck, which was narrower so it could be covered and sealed with ease.
The rim of the mouth was thicker than the walls of its body, so that it would not break during use when various utensils pressed against it. This clay spout could be closed with a wooden lid, a stone or a clay plate.
Throughout the outer surface, κιούπι has horizontal grooved strips (belts), which strengthen its sides making it more durable and stable.
Olive oil, cereal, flour, fruits and other valuable products were stored in these, in large quantities in store rooms of houses, in towers, in cellars of monasteries, in olive mills and also in fields where they were used for water storage, when there was no source of water (water wells or running water) near the field.
“Kioupis” are now used as decorative elements, mainly in gardens and courtyards and more rarely for practical needs in villages where plastic or metal containers have not yet arrived.
Alexis Totsikas, “Greek folk heritage | Tools and constructions of the material of traditional life”, Armosbooks, 2008