~ Wo vom Zapfen schäumt das Bier ~
The verse seems to indicate that one can be rest assured that a good innkeeper will deliver the beer in this mug without slopping it around. The stein without lid was made by the Thuemler Co. of Rochester, PA for the Arthur Schiller Co. of Chicago, ca. 1900.
Wo vom Zapfen schäumt das Bier,
kannst du ruhig sitzen, sag ich dir,
gute Wirthe haben keine Spritzen.
Where from the tap foams the beer,
you can sit in peace, so I say,
(because) good innkeepers do not splash or spray.
Translation: Roy De Selms
Photo credit: Unknown