According to the Corning Museum of Glass glossary, a rhyton is a drinking vessel used in many parts of the ancient world. Most ancient glass rhytons are of the Roman period. They are in the form of a horn, sometimes with the head of an animal at the tip.
Glass of the Caesars
by
Donald B. Harden, Hansgerd Hellenkemper, Kenneth Painter, David Whitehouse
Catalogue of illustrations of ware
by
Mt Washington Glass Co.