Turn your DrinkTanks Growler into your own personal, portable mini-keg with the DrinkTanks Keg Cap System Accessory Kit. Designed with the idea of keeping beer and beverages fresh to the last drop, this kit includes a cap, CO2 injector, and two 16-gram, threaded CO2 cartridges. That means you can dispense the contents without opening the growler, and you have the option to inject CO2 for ultimate preservation. Compatible with both the DrinkTanks 64-oz. Growler and 128-oz. Juggernaut Growler. Weight: 1 lb. Dimensions: 7” x 7” x 3-1/2”.