Abstract: A compact medical waste disposal device, operable without water or other processing, disposal or disinfecting fluid or solution, for pulverizing Sharps into medically acceptably safe small particles, and directing the particles into a disposable container. The disposal device comprises a waste receiving and pulverizing chamber containing a pulverizing disc blade, with the disc blade being operable only when the pulverizing chamber is sealed. The pulverizing disc grinds the medical waste against the inner surface of a closely adjacent liner of the pulverizing chamber. Relatively heavy elements, rotatably swing on the upper surface of the pulverizing disc to direct medical waste materials and fragments, towards the pulverizing interface between disc and liner.