This ordinary drinking vessel is decorated with applied drops of glass drawn into points, or prunts, that give the beaker its name, Krautstrunk, a German word meaning "cabbage stalk." Although primarily decorative, the prunts also provided a surer grip on the vessel, which was heavy when filled.
Jacques Mühsam, Berlin (sold 1927)
Husband, Timothy B., and Jane Hayward, ed. The Secular Spirit: Life and Art at the End of the Middle Ages. New York: Dutton Publishing, 1975. no. 34, p. 43.