Steve Spanglers Science

Mentos Geyser Tube

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  • Regular price £5.99


The Geyser Tube is a loading tube for the now famous Diet Coke geyser powered by Mentos. If you’ve ever tried doing the experiment, you know how difficult it can be to drop the Mentos into the bottle before the reaction takes off… and you’re soaking wet. The Geyser Tube will give you a perfect launch every time with time to stand back.

  • The toy that changed YouTube!

  • Turn a bottle of soda and a roll of Mentos into an erupting geyser

  • Improved geyser trigger mechanism to prevent accidental eruptions

  • Shoot a geyser up to 30 feet high!

Improvements to the Geyser Tube have taken the geyser-creating tool to a whole new level. The trigger mechanism now has a double pull pin action, making sure there’s no unwanted eruptions. When you’re ready to pull the pin, a tighter seal means that you can achieve a 30-foot geyser with as few as two Mentos candies.

Recommended for children 6 and up.

What’s Included?

  • Single Mentos and Geyser Tube (individual packaging)

How Does It Work?

Attach the Geyser Tube to any bottle of soda (but diet soda works best because it’s not sticky – no sugar!) Secure the trigger pin in place. Load the Mentos into the tube, lock the special pressurizing nozzle in place and pull the pin. Oh, by the way, it’s best to pull the pin and then run away. The Mentos drop into the bottle and the powerful soda geyser comes shooting out the top with enough pressure to reach an incredible height of 9 meters (30 feet). That’s a record!

If you’ve never tried this amazing soda experiment, the Geyser Tube will give you a perfect launch every time. If you’re a Mentos geyser pro, you’ll quickly see how to use this device to make the most out of this cool science demo.

What Does It Teach?

The Mentos eruption has become an internet sensation, but there is science behind that soda. Check out our Mentos Geyser experiment for the whole story!

Science Fair Connection:

Setting off a Mentos Geyser isn’t, by itself, a science fair project, but there are some very easy ways to make experimenting with geysers a great science fair project. The key to creating an awesome Mentos Geyser themed science fair project is isolating a variable. A variable is a component of the experiment that changes and, hopefully, alters the experiment. Some examples of possible variables with the Mentos Geyser include:

  • Try different brands or types of soda and find a way to measure which erupts the highest.

  • Test different numbers of Mentos to find the number of Mentos that creates the tallest geyser.

  • Find out what temperature is best for geyser eruptions.

These are just examples of variations that you can try to turn the Mentos Geyser Tube into a science fair project. Remember, you have to keep all other factors the same. If you’re testing different brands of soda, make sure the number of Mentos you use is always the same and that the sodas are kept at the same temperature.