The term of Kalpis is said to be the Thessalian word for hydria and is a late form of vase of Greek pottery of the hydria type, used for carrying water. It has two side loop-handles and also a vertical handle on the shoulder reaching to the neck that was used when pouring. The neck is comparatively smaller, and the belly passes into the shoulder, and the shoulder into the neck, in a continuous curve; it has a rolled lip. The kalpis is introduced by about 520 B.C. and is the preferred style of the red-figure painters. This form survives down to Hellenistic times..