a trailing edge extending along a second line which intersects said first line, wherein {HEAD ~ a length} between the leading edge and the trailing edge adjacent to the convex edge is less than {TAIL ~ the first length} of the first circumference of the open top end of the plastic foam conical body and a length between the leading edge and the trailing edge adjacent to the concave edge is less than the second length of the second circumference of the closed bottom end of the plastic foam conical body, and 
is less than
a trailing edge extending along a second line which intersects said first line , wherein { HEAD ~ a length } between the leading edge and the trailing edge adjacent to the convex edge is less than { TAIL ~ the first length } of the first circumference of the open top end of the plastic foam conical body and a length between the leading edge and the trailing edge adjacent to the concave edge is less than the second length of the second circumference of the closed bottom end of the plastic foam conical body , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH