~ Mädlein schenk ein ~
The verse is self explanatory on this blue-gray, salt-glazed, stoneware, Jugendstil (youth style = modern art) stein marked with the Merkelbach & Wick logo, ca. early 1900's.
Mädlein schenk ein
es soll's letzte nicht sein!
Young lady fill it up
(and) it shall not be the last!
Translation: Roy De Selms
Photo credit: Unknown