A positionable platform for use with a beverage holder, the positionable platform including a monolithic body sized similarly to a standard twelve ounce beverage container, the body having an upper platform portion positioned adjacent to a first end of a wall portion thereof, with a plurality of slotted retention apertures distributed about the body and substantially aligned therewith. The invention is characterized in that a security zone, which can be sealed off by controllable access doors and monitored by sensors, is provided between the passenger cabin and cockpit areas. A feedback assembly is coupled to the displacement shaft for moving the displacement shaft to substantially maintain a predetermined load exerted on the displacement shaft by the upper plate assembly.