Abstract: A molding apparatus. The apparatus includes a preformer for supplying a predetermined amount of molten material and an asymmetrical core for receiving the molten material. The asymmetrical core includes a first cavity and a second, female cavity, wherein the depth ratio of the second cavity to the first cavity is greater than about 4. A movable bottom plate in the second cavity varies the depth ratio of the second cavity. A pressure differential system is connected to the asymmetrical core for forming the molten material inside the asymmetrical core. The apparatus of the present invention is particularly well suited for forming a blow molded float for a floating dock system. In the preferred embodiment, the floating dock system includes a docking surface and at least one blow molded float. The blow molded float preferably has at least four sides; a thickened top mounting surface; and a bottom joined to the thickened top mounting surface by the sides.