Abstract: A device is used to squeeze side walls of a flexible bottle containing a carbonated beverage. The device is preferably a generally horseshoe-shaped clip having an arched portion, two parallel legs extending from the arched portion, and end tips flaring outwardly from each of the two parallel legs. The perpendicular distance between the two parallel legs is less than the diameter of the flexible bottle. Sufficient pressure is maintained inside the flexible bottle so that the beverage contained therein remains carbonated. The pressure maintained inside the flexible bottle is in the range of three to five psi.