This disclosure relates generally to contaminable medical products. The currency changer device is adapted to accept cash in bulk for a cash transaction and includes a housing, a coin accepting tray, a coin sorter, a plurality of respective coin bins, and a coin dispenser. The impregnation zone includes a plurality of contact surfaces, at least one of the plurality of contact surfaces defining a cut-away portion downstream in a run direction of the roving of a point-of-contact for the at least one of the plurality of contact surfaces.