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