Systems, apparatus and methods are described herein for dispensing a carbonated beverage. In some embodiments, an apparatus includes a first cylinder that defines an interior region that can contain a volume of carbonated water and a first piston separating the interior region. A second cylinder is coupled to the first cylinder and defines an interior region and a second piston separating the interior region and operatively coupled to the first piston. The interior region of the second cylinder can contain a volume of beverage concentrate. A flywheel assembly is operatively coupled to the first cylinder and to the first piston and can control a predetermined ratio of a volume of carbonated water from the first cylinder and a volume of beverage concentrate from the second cylinder to be dispensed when a force is exerted on the piston by a flow of carbonated water through the first cylinder.