A molten metal holding and pouring box for holding a volume of a molten metal at a molten temperature, the molten metal holding and pouring box having: an outer structural supporting layer and at least one inner thermal insulating material layer to maintain the molten temperature of the volume of molten metal within the molten metal holding and pouring box; an upper rectangular-shaped section for receiving the volume of the molten metal through a closeable opening in the upper rectangular-shaped section of the molten metal holding and pouring box the closeable opening disposed in an extended cover over the upper rectangular-shaped section; a unitary dual nozzle assembly; and a pair of stopper rods which engage a pair of nozzles (12b, 12c) in the unitary dual nozzle assembly for controlling a flow of the molten metal poured through each of the pair of nozzles (12b, 12c) characterised by: a lower inverted pyramidal-shaped section comprising a downward sloped region extending from the upper rectangular-shaped section to a bottom region, the lower inverted pyramidal-shaped section comprising no greater than one-third of the volume of the upper rectangular-shaped section; the pair of nozzles (12b, 12c) constructed of a low thermal resistance refractory metal to maintain a heat exchange relationship between the pair of nozzles (12b, 12) and the molten metal; and the unitary dual nozzle assembly located in the bottom region of the lower inverted pyramidal-shaped section to pour 75 percent of the volume of the molten metal received through the closeable opening with a corresponding drop of not more than 30 percent in the rate of flow through either of the pair of nozzles (12b, 12c), the unitary dual nozzle assembly thermally insulated from contact with the lower inverted pyramidal-shaped section by a thermal insulating material while being in thermal contact with the molten metal contained within the molten metal holding and pouring box during pouring and non-pouring periods. an outer structural supporting layer and at least one inner thermal insulating material layer to maintain the molten temperature of the volume of molten metal within the molten metal holding and pouring box; an upper rectangular-shaped section for receiving the volume of the molten metal through a closeable opening in the upper rectangular-shaped section of the molten metal holding and pouring box the closeable opening disposed in an extended cover over the upper rectangular-shaped section; a unitary dual nozzle assembly; and a pair of stopper rods which engage a pair of nozzles (12b, 12c) in the unitary dual nozzle assembly for controlling a flow of the molten metal poured through each of the pair of nozzles (12b, 12c) a lower inverted pyramidal-shaped section comprising a downward sloped region extending from the upper rectangular-shaped section to a bottom region, the lower inverted pyramidal-shaped section comprising no greater than one-third of the volume of the upper rectangular-shaped section; the pair of nozzles (12b, 12c) constructed of a low thermal resistance refractory metal to maintain a heat exchange relationship between the pair of nozzles (12b, 12) and the molten metal; and the unitary dual nozzle assembly located in the bottom region of the lower inverted pyramidal-shaped section to pour 75 percent of the volume of the molten metal received through the closeable opening with a corresponding drop of not more than 30 percent in the rate of flow through either of the pair of nozzles (12b, 12c), the unitary dual nozzle assembly thermally insulated from contact with the lower inverted pyramidal-shaped section by a thermal insulating material while being in thermal contact with the molten metal contained within the molten metal holding and pouring box during pouring and non-pouring periods.