A product dispensing system includes a hopper, a housing defining an outlet lumen in communication with the hopper, an exit port, a valve, and a piston. The valve is transitionable between a closed position, wherein the exit port is closed off from the outlet lumen, and an open position, establishing communication between the outlet lumen and the exit port. The piston is movable from a first use position, wherein the piston partially occupies the outlet lumen, to a storage position, wherein the piston fully occupies the outlet lumen to urge any product mixture in the outlet lumen back into the hopper. The piston may further be movable between the first use position and a second use position to draw the product mixture from the hopper into the outlet lumen and to urge the product mixture out of the exit port.