This invention relates to an apparatus and method for the volumetric measuring and dispensing of ice from a holding bin. The field effect transistor includes first and second disordered semiconductor layers separated by an insulator. The groove is laterally offset away from the back side and proximate to a near side of the rail. The channels form substantially parallel passageways along the length of the shaft that are spaced apart around the shaft circumference and series connected. The second wall panel is connected to the second base panel on a side opposite the seam and at an angle, referred to herein as a third angle, of about 120 degrees to about 170 degrees.