Original Hand Crafted Geyser Tube

What's included?

• Two Original Hand Crafted Geyser Tubes
  • Yellow and clear plastic
  • 6.25" tall and fits on any plastic soda bottle
• Activity guide

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."

For a full explanation on how a MENTOS Geyser happens, click here.

What does it teach?

While the Geyser Tube is fun and (quite literally) a blast, there is also a lot of valuable science that can be taught, learned, and performed through its use. The reaction itself teaches awesome lessons in states of matter, chemical bonds, surface tension, and more. The Geyser Tube is the perfect tool to streamline the reaction and enable endless experimentation. That means the Geyser Tube is a must-have for science fairs! Test what type of soda creates the best geyser, which geyser starter produces the largest eruption, or even how many MENTOS candies are ideal for creating a giant, foamy blast.

Product FAQ

• Will I get wet?
  There is a possibility but the geyser tube device is designed to minimize the likelihood of getting wet, especially with the 3-foot long string.
   
• 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 25 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.