Terracotta kantharos (drinking cup), Etruscan culture, late 4th century B.C.

http://www.metmuseum.org/art/collection/search/255162 Etruscan, Terracotta kantharos (drinking cup), late 4th century B.C., Terracotta, Overall: 5 1/16 x 6 7/8in. (12.9 x 17.4cm); diameter of lip  3 7/8in. (9.9cm); diameter of body  4 5/16in. (10.9cm); diameter of foot  2 1/4in. (5.8cm). The Metropolitan Museum of Art, New York. Rogers Fund, 1964 (64.11.6)
Obverse and reverse, ketos (sea monster).
Because the trip to the Underworld was believed to involve a sea voyage, marine creatures, both real and imaginary, were often associated with death in Etruscan culture. Both hippocamps (sea horses) and kete (sea monsters) were presented in a positive light, often guarding the deceased or transporting them to the Underworld.