The stoup, carved in Pentelic marble, has a "bulbar" body with an upper circular opening and a cylindrical base. A large wavy branch with ivy leaves winds around the raised lip. Below, a Greek inscription in capital letters runs along the entire circumference. Below is a cross whose side arms hang the Greek letters Alpha and Omega. At the ends of the arms there are other letters and monograms. Below the cross a lion's head with a hole, very damaged.
The piece stands out for the high quality of the decoration and is probably the work of a workshop in Constantinople and datable to the 6th century; this typology of artifact is connected to the oriental rite of blessing of the waters whose exaltation is confirmed by the long Greek inscription taken from the Bible (Isaiah XII, 3 and Psalms, XXVIII, 3).