A combined future lottery and optional instant game uses a central computer connected on-line with multiple game terminals. The planar graphite plate is provided with a frame engaging protrusion around its periphery and with beveled edges bordering the broad top and bottom surfaces of the graphite plate. Due to the structure of the baffle system, it may be inserted through the narrow orifice and then be manipulated, via articulated joints, such that it rests adjacent to the wider walls of the vessel.