{TAIL ~ the concave edge} is adjacent to the closed bottom end of {HEAD ~ the plastic foam conical body}, 
{ TAIL ~ the concave edge } is adjacent to the closed bottom end of { HEAD ~ the plastic foam conical body } ,
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH