A soda carbonation retaining apparatus includes a container has a bottom wall, a top wall and a perimeter wall. The bottom wall has an access aperture extending therethrough. The top wall has a nozzle fluidly coupled thereto. A plurality of tracks is mounted to an inner surface of the perimeter wall. A panel is mounted within the housing and is mounted on the tracks. A cover is positionable in a closed position closing the nozzle or in an open position exposing the nozzle. A flexible bag is mounted within the housing and has an upper edge attached to the perimeter wall adjacent to the top wall. The flexible bag is fillable with a carbonated fluid and a volume of the flexible bag is reduced as the panel is moved upwardly toward the nozzle to reduce an amount of free space in the flexible bag.
