A mouthpiece is attached by {HEAD ~ a reduced diameter neck} to the first end of {TAIL ~ the cup portion} 
A mouthpiece is attached by { HEAD ~ a reduced diameter neck } to the first end of { TAIL ~ the cup portion }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL