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