| CPC B01F 31/44 (2022.01) [B01F 33/50111 (2022.01)] | 14 Claims |

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1. A mixing device comprising:
an agitator insertable within a hand-held, shakeable container and composed of a framework comprising a single compression spring arranged to provide voids between coils thereof to allow for flow of one or more of liquids, powders, and other materials into and out of portions of the agitator, the agitator having a center portion, a first distal portion, and a second distal portion, the first and second distal portions having diameters generally larger than a diameter of the center portion; and
an elongated weighted member removably and threadedly affixed to the center portion of the compression spring of the framework and having one or more retention members configured to thread to and retain the weighted member within the agitator.
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