{HEAD ~ a trailing edge} extending along a second line which intersects said first line, wherein a length between the leading edge and the trailing edge adjacent to the convex edge is less than the first length of the first circumference of the open top end of {TAIL ~ 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 
{ HEAD ~ a trailing edge } extending along a second line which intersects said first line , wherein a length between the leading edge and the trailing edge adjacent to the convex edge is less than the first length of the first circumference of the open top end of { TAIL ~ 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
HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL 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