Fizz Keeper

Howald, R.A. (1999). The fizz keeper, a case study in chemical education, equilibrium, and kinetics. Journal of Chemical Education, 76, 208-209. 

How does a Fizz Keeper keep the fizz in soft drinks ... 

The Fizz Keeper is a little hand pump that you can screw into the neck of an opened bottle in order to pressurize the contents and preserve the carbonation. Pumping air into the bottle can certainly restore the pressure above the solution, making the bottle feel hard, like it was when it was purchased. But the Fizz Keeper s manufacturers seem to be unaware of Henry s Law. 

Ask students the following questions about using a fizz-keeper ... 

Students could carry out a further investigation into the length of time and volumes for which different styles of fizz-keeper work effectively. These could be compared with the fizziness retained by pouring the remaining drink into a smaller botde to create a smaller head space. 

Reed A Howald, "The Fizz Keeper, a Case Study in Chemical Education, Equilibrium, and Kinetics," j. Chem. Educ, Vol. 76, 1999, 208-209. 

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