A liquid dispensing device for a trash container spray system may be provided. In accordance with at least one embodiment, the liquid dispensing device is activated upon the trash receptacle being lifted and placed back on the ground, moving a piston and actuator component of the liquid dispensing device from a first to second position, back to the first position, and providing the force needed to spray the liquid compound into the interior of the trash receptacle. In accordance with at least one embodiment, a manually activated pump feature may be provided for spraying a liquid compound into the interior of a trash receptacle via the liquid dispensing device. In accordance with at least one embodiment, a float valve feature may be provided for spraying the liquid compound into the interior of the trash receptacle via the liquid dispensing device.