In certain aspects, the present invention provides compositions and methods for promoting bone growth and increasing bone density. The IQ mixer comprises a pair of Gilbert cells and a degeneration inductor. Flushing hydrogen between the layer growths creates abrupt junctions between superlattice structure layers. The reflected light reflected by the reflective film and the holographic image formed by the hologram forming part are detected by detectors disposed at different positions, respectively. A plurality of filaments is smoothly hanged to both electrodes according to the flat surface and the curved surface without fixing. A package of individual beverage containers includes a plurality of beverage cartons abutted at respective edge surfaces; each beverage carton contains a plurality of individual beverage containers.