Fizz-Keeper

A Fizz-Keeper on a Pepsi bottle

A Fizz-Keeper is a type of closure that is marketed as a way to keep carbonation in soft drinks. It consists of a small round hand pump that is screwed onto the top of a plastic soft drink bottle, which is then used to pump air into the bottle, preventing the drink from going flat.[1][2][3][4]

Research into the Fizz-Keeper's mechanisms and processes has shown that the Fizz-Keeper, let alone pressurizing a soda bottle, does not actually prevent loss of carbonation, with its marketed claims being dismissed as pseudoscience.[1][2]

  1. ^ a b Joseph A. Schwarcz (2004). "How does a Fizz Keeper keep the fizz in soft drinks?". Dr. Joe & What You Didn't Know. ECW Press. p. 24. ISBN 9781550225778.
  2. ^ a b John P. Williams; Sandy Van Natta; Rebecca Knipp (October 2005). "The Fizz-Keeper: A Useful Science Tool" (PDF). Journal of Chemical Education. 82 (10): 1454–1456. Bibcode:2005JChEd..82.1454W. doi:10.1021/ed082p1454.
  3. ^ Brian Rohrig (February 2002). "The Fizz-Keeper: Does It Really Keep the Fizz?" (PDF). ChemMatters: 11–13. Archived from the original (PDF) on 2012-03-06. Retrieved 2009-05-16.
  4. ^ Reed A. Howald (Feb 1999). "The Fizz Keeper, a Case Study in Chemical Education, Equilibrium, and Kinetics". Journal of Chemical Education. 76 (2): 208–209. Bibcode:1999JChEd..76..208H. doi:10.1021/ed076p208.