<p>A blow molded product provided by a direct blow molding method and having a tubular body part (3) disposed on the upper side of a bottom part (4) and a cylindrical mouth part (2) disposed on the upper side of the body part (3), wherein at least three cutout lines (7) are formed on a bottom surface (5) radially from the center thereof by a bottom part split metal mold (15) for blow molding.</p>
