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Fizz-Keeper Pump

A handy little pressurizing device for a soda bottle science.

  • Fizz Keeper Pump 2 Pack
    Item #: WPMP-002

    $7.99 In Stock

  • Fizz Keeper Pump 10 Pack
    Item #: WPMP-010

    $34.99 In Stock

Usually ships out the next day.

The Fizz-Keeper is a handy little pressurizing device that was designed to keep the bubbles in a 2 liter bottle of soda pop. Transform your Fizz-Keeper into a science tool and you can make Cartesian divers sink or swim more easily. Suitable for students 5th grade through high school. Also available with 39 Experiments with the Fizz Keeper book by Brian Rohrig.

What's included?

  • 1 Fizz-Keeper Pump

Product FAQ

Warning - Choking Hazard

Miniature Cloud in a Bottle

Jen Lasater    -  November 15, 2012

1 2 3 4 5
This user gave 4/5 stars


I use these to do a miniature version of the Cloud in a Bottle experiment also found on this site. I use a baby soda bottle with a fizz keeper, a little water and rubbing alcohol, and about 20 pumps. Pop the top and you get a cloud! The kids love it. The fizz keeper seal does wear out after a while, but I was able to find these at my local grocery store in the soda section, so they are easily replaced.

Fizz Keepers

J Rothfuss    -  November 1, 2011

1 2 3 4 5
This user gave 4/5 stars


We pumped and pumped with varied and limited results. Is there a minimum volume of marshmallows-- or should we have used the large ones? The students were a bit disappointed with this one.

Fizz Keepers

Lori Henault    -  March 8, 2010

1 2 3 4 5
This user gave 4/5 stars


I had to replace some fizz keepers purchased earlier in the year after much use by students. I wish they would last longer than six months. Ordering from Steve Spangler Science is always easy and quick.

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