A head unit configured to couple to a handle of an electric toothbrush, wherein the handle generates vibrational energy transferred to the head unit, the head unit comprising a proximal end and a distal end； a base adjacent to the proximal end, an exterior wall extending from the proximal end to the distal end, wherein the exterior encases a plurality of hollow chambers, wherein each of the plurality of hollow chambers are separated by a scaffold, wherein the scaffold connects to the exterior wall； and a bulb having an exterior surface configured to transfer the vibrational energy to an object.
