Abstract: A method and device is provided for carbonating water or a beverage with a minimum of carbon dioxide gas and operating steps. A temporary connection of a regulated gas supply to a container tank is used for the period of time required to carbonate and saturate the water or beverage. After the liquid is saturated with the gas and carbonated, the gas supply hose is disconnected. The size of the container tank is restricted to the overall weight of the combined unit if it is to be used on a portable basis. Larger amounts of liquid can be carbonated with this method, if the carbonating and dispensing set up is in a stationary, permanent location. The portable container tank is cooled by ice packs or cooling coils and air contact with the tank is kept to a minimum by providing an insulating carry container which encloses the container tank and cooling means.