Keep fizz and the freshness of soda intact with the Fizz Keeper Pump Cap for 2 Liter Bottles by Jokari. Once a soda bottle is opened its cap is unable to hold in its fizz for long. Made of durable plastic.The bottle stopper kit uses a patented technology for keeping the pressure and fizz fresh inside the bottle since you first opened it. Installing is very easy; just pop this bottle cap into any open 2-liter soda bottle and you can rest assured you will have a refreshing drink every time you want. Durable plastic construction. Patented pump mechanism keeps fizz in. Easy to use. Fits any 2 liter soda bottle. Replaces screw on plastic cap. Color: white.