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Geyser Tube^™

Name: Geyser Tube™
Brand: Steve Spangler Science
SKU: GGEY-105
Availability: InStock
Rating: 3.67 (7 reviews)

Rated 3.67 out of 5 based on 3 customer ratings

(7 customer reviews)

Steve’s famous Mentos Geyser Tube
A soda eruption that can go 30 feet into the air
The Deluxe version comes with 3 additional caps to change the eruption shape
Simply pull the pin to release the Mentos, and run for cover
Buying in bulk? Click here for a 10-pack

SKU: 857155 (Extreme Geyser Tube) | 857130 (Geyser Tube)

Frequently Purchased Together

The Toy That Changed YouTube

Welcome to where the explosions of science fun first occurred: Steve Spangler Science! Our Geyser Tube® was the ground-breaking tube from which the Diet Coke geyser science experiment, powered by Mentos, occurred. To date, the Geyser Tube Experiment is one of the most viewed science experiments online. If you’ve ever seen a Geyser Tube in action, you know just how addicting that wild soda eruption can be. We now have the perfect way to share this exciting soda spray gadget with everyone you know.

Geyser Tube Event Packs and Experiment Fun

Check out one of our Geyser Tube event packs. Just can’t get enough that addicting Geyser Tube action? Want more Geyser Tubes for your whole class? Perhaps you want to purchase multiple Geyser Tubes for your science fair experiment. Our affordably priced Geyser Tube experiments make it easy to purchase multiple units so that fun can be had by everyone in your home or classroom. Our units are great for parties, too!

Geyser Tube How-To

Get the perfect launch and see the Mentos and diet soda reaction for yourself every time — without getting drenched! Attach this special Geyser Tube to any plastic two-liter diet soda bottle. Secure the trigger pin, then load the desired number of Mentos mints into the tube. Once you have locked the pressurizing nozzle in place, pull the pin and clear the area. When the Mentos candies drop, the soda geyser will shoot as high as 30 feet!

What Makes the Geyser Tube Better Than All the Rest is the Improved Trigger Mechanism!

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.

Get the Perfect Launch Every Time!

With the Geyser Tube, you will quickly see how to use this gadget for cool science demonstrations to wow all your friends!

The Double Pull Pin Action Gives You Time to Move Out of the Way and Stay Dry!

When the mentos candies drop into the bottle, the soda geyser will shoot to an incredible height of 30 feet!

Product Description

What is Happening

Soda is made from sugar (or artificial sweeteners), water, favoring and preservatives. The bubbles inside the sodas are made from carbon dioxide gas (CO₂), which is added in the bottling plant by using tons of pressure in low temperatures. The gas stays suspended in the liquid until the bottle is opened. When a Mentos mint is dropped into a bottle of soda, the gelatin and gum from the dissolving candy surface breaks the surface tension of the dissolved gas, disrupting the water mesh. The bubble formations are exacerbated by the thousands of tiny micro-pits (nucleation sites) all over the candy’s surface, providing more places for the CO₂ bubbles to form. With the candy at the bottom of the bottle and the release of the gas, the liquid is pushed up and out of the bottle in an incredible liquid blast!

Steve Spangler Science

Check out this and other science experiments with that awesome Steve Spangler WOW factor here on our comprehensive website! We carry over 350 products specially designed by top educators, engineers and scientists to get all kids excited about science.

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.

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 30 feet. That’s a record!

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.

You also have the option of attaching three different Geyser Tube caps: Fountain, Fan, or “Runaway.” Choose the shape of your geyser with three new Geyser Tube caps. Pick your Fountain cap to create a three spout geyser that resembles a fountain, the Fan cap to create a fan-shaped soda geyser, or the Run Away cap. Let’s just say you won’t want to stick around to see the shape that the last one makes.

What’s Included:

Extreme Geyser Tube®

New and improved Geyser Tube
- Double pull pin action
- Pressurizing nozzle
- Improved threading
Roll of MENTOS chewy mints
Fountain geyser cap
Fan geyser cap
“Runaway” geyser cap
Instructions for creating the ultimate soda geyser

Geyser Tube®

New and improved Geyser Tube
- Double pull pin action
- Pressurizing nozzle
- Improved threading
Roll of MENTOS chewy mints
Instructions for creating the ultimate soda geyser

How Does It Work?

Speaking to large crowds of buyers in New York, Steve Spangler shared a condensed history of the original geyser experiment. “Science teachers have been doing this experiment for years and years, but the original method used Wintergreen Lifesavers. When the manufacturer of the candies changed the diameter making them larger than the opening of the 2-liter bottle, teachers went looking for a substitute.” Steve explained that MENTOS candy did the trick, but dropping them into the bottle and getting away before being covered in soda was difficult. “That’s why we created the Geyser Tube. Now you get a perfect drop every time without getting drenched.”

Experiment:

You’ll need a 2-liter bottle of diet soda (diet doesn’t make a sticky mess) and an outdoor location for your geyser. Select a flat surface to place the bottle.
Pull the double-action trigger pin to the “out” position and drop 2-5 MENTOS candies into the Geyser Tube. Once the candies are in the tube, push the trigger pin to the “in” position, locking the candies in the tube. You can also add the MENTOS into the tube by untwisting the red cap atop the tube, and dropping the candies in that way.
Once the candies are settles into the tube, unscrew the 2-liter soda bottle’s cap and replace it with your Geyser Tube.
Warn everyone to stand back. Countdown… 3-2-1… and pull the trigger. The MENTOS will drop and the soda will go flying into the air!
Pour out the remaining soda and take a look at the MENTOS. You can see where the soda has eaten away at the surface of the candy. No need to waste the candy… they still taste great.

Take the Taste Test

You’ll notice that there is still some soda left in the bottom of the bottle. Twist off the Geyser Tube and taste the soda. Beside tasting minty fresh, you’ll probably notice that all of the bubbles of carbon dioxide are gone. The soda is flat. Very interesting!

The Science Behind the Fizz

What made the soda shoot up so much higher? You already know why the soda erupts (if you forgot, re-read the explanation part of the previous experiment called The Original MENTOS Geyser). Look closely at the cap on top of the Geyser Tube. Do you notice the small hole in the top? That’s the secret! The smaller hole caused the soda to build up more pressure and the result was a 20 to 30 foot soda geyser.

You may have also noticed the clear plastic sleeve that slides back and forth on the Geyser Tube. When you pull the pin, the sleeve drops down to cover the two holes at the bottom of the Geyser Tube where the pin used to be. Without the sleeve, lots of soda shoots out from the two holes and keeps the geyser from going higher. Steve Spangler worked on many ways to keep the soda from shooting out of the holes and the sleeve method is the one he liked the best (and so did the attorneys who filed the patent for the Geyser Tube).

Science Fair Connection:

Setting off a Mentos Geyser isn’t, by itself, a science fair project. There are some very easy ways to make experimenting with geysers a great science fair project, though. 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.

Frequently Asked Questions

Will I get wet?

There is a possibility but the geyser tube device is designed to minimize the likelihood of getting wet.

Is it reusable?

Yes, all you need to do the experiment again is another pack of Mentos and a new bottle of Diet Coke.

How high does it shoot?

It all depends on the bottle of Diet Coke; a new bottle works better than one that has been sitting around for a while. On average though, it shoots to a little over 20 feet.

What type of soda works best?

We have experimented with all types of soda and the soda that gave us the best results was Diet Coke due to having the most carbonation. However, any soda or carbonated beverage will work.

Does it hold the entire roll?

No, the maximum that the tube holds is 11. The roll is 14 so you can snack on the other three!! We found that 7-10 Mentos produces the highest Geyser.

Safety Information