Stork Custom Cornet Mouthpiece. The traditional Vacchiano cornet cups offer the sound quality sought by serious brass band players, yet greater versatility in range and response than other popular traditional cornet mouthpieces. All cups are available with the various Vacchiano rims and in either the standard shank or the short shank style. A - Traditional Deep Cornet Cup SC - Shallower Cornet Cup - (relative to deep cornet mouthpieces