A device for mixture of substances, whether in the form of a fixed or removable cap or in the form of emersion within a container, utilizing individual internal substance containment vessels, controlled by an external actuation mechanism. The system actuation mechanism can be placed in a locked position for storage, shipping or to ensure integrity of solutions. Multiple containment vessels may be utilized, as well as multiple compartments within an individual container to produce multiple mixtures. A further embodiment encompassing a pivotal actuator and removably attached mixing mechanisms is also illustrated.