SWIG IF YA CAN (Q46641)

The -- SWIG IF YA CAN -- Jar The purpouse of a jar's is to be able to drink from it, you thought? Not with this one! It makes it hard for amusement. Serve your victim a drink and have fun. It was inspired by a jar with the german dialectic inscription "SAUF WONNST KONNST" which translates well to the choosen title. ------------------------------------------------------------------------ I couldnt find the correct english name of this thing, only a huge lot of german synonyms: (vexierkrug, vexiergefäß, lochkrug, halbekrug, scherzkrug, gaudikrug) If someone knows the correct english term, please comment. All my guesses (puzzling jar, TRY jar, ..) where obviously wrong. Btw.: if you know the open secret, please dont spoil it in the comments.