The new design is applied to a container-lid assembly of the roll-on type, said container being shaped in order to be seated on the lid, in an inverted position when in an inoperative condition. The apparatus includes a plurality of pixel sensors and a controller. The size of the anode connecting surface is larger than the size of the cathode connecting surface. Blocks having more complete edge information are selected as clear blocks. The moiety B can be one of a variety of moieties, including moieties having nootropic activity or other biological or physiological activity.