The sidewall portion extends downward from the shoulder region to {HEAD ~ a base portion} having {TAIL ~ a base} 
having
The sidewall portion extends downward from the shoulder region to { HEAD ~ a base portion } having { TAIL ~ a base }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL