Nothing is worse than sitting down with your ice cold cola, only to discover that is flat. Using Jokari"s fizz keeper pump and pour, you can re-pressurize your two liter bottles so that they retain their carbonation. Simply squeeze the pumping balloon, and make sure the seal is tight. With pumping, the soda"s life will be greatly elongated, and you can flip the pump back on its hinge for pouring.