Geometric style Kraters such as this one were used as grave markers. This krater illustrates prothesis or the laying out of the dead for a funeral. Large kraters such as these are usually around 40 inches tall and have a hole in the bottom. The hole would allow liquid offerings for the dead to flow into the earth. This type of vessel was replaced as a grave marker by stone monuments in the 6th century B.C.
photo from the Metropolitan Museum of Art