An actuator apparatus is provided. The actuator apparatus includes a slidable plunger with a remote end located proximate a reservoir within a vessel having an exit opening, a shape memory alloy (SMA) coil wound around the slidable plunger, and electronic circuitry connected to the SMA coil. Liquid may be provided to the reservoir via the exit opening, thereby sliding the slidable plunger away from the exit opening and expanding the SMA coil. Wherein when the SMA coil is expanded, electricity is provided via the electronic circuitry to the SMA coil to cause the SMA coil to return to a compressed configuration, moving slidable plunger within the vessel to force the liquid from the vessel via the exit opening.
