US Patent 11234561 Shaker cup

Apparatus for agitation of liquid and powder mixtures. The apparatus includes a vessel combining a tapered annular side wall of the body of the vessel, an angled top inner surface of the cap portion which creates greater turbulence, and a particular length to average diameter ratio. The interruption of currents to create shear, turbulence and eddy currents of the liquid within the vessel provides greater mixing of the powder within the liquid.