Product dispensing system for dispensing a homogenous fluid-particulate mixture

A product dispensing system configured to dispense a product mixture, comprising:

• a hopper;
• a housing coupled to the hopper and defining an outlet lumen in communication with the hopper;
• an exit port extending from the housing;
• a valve disposed within the outlet lumen and selectively transitionable between a closed position, wherein the exit port is closed off from the outlet lumen, and an open position, wherein communication between the outlet lumen and the exit port is established;
• and
• a piston disposed within the outlet lumen, the piston movable relative to the housing between a first use position, wherein the piston partially occupies the outlet lumen, and a storage position, wherein the piston fully occupies the outlet lumen,
• wherein, the piston is movable from the first use position to the storage position to urge any product mixture in the outlet lumen back into the hopper.