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Mentos and Soda Project


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Doing the Mentos and Soda Fountain Project
The mentos & diet cola fountain is easy and fun.

This is an easy project. You'll get all wet, but as long as you use diet cola you won't get sticky. Just drop a roll of mentos all at once into a 2-liter bottle of diet cola.

Anne Helmenstine
This part is really easy, but it happens fast. The fountain sprays as soon as you slide all of the mentos (at once) into an open bottle of soda.

How to Get the Best Fountain

  1. The trick is to make sure all of the candies drop at once into the bottle. Line up the tube containing the candies with the open bottle of soda.


  2. Eric just removed his finger and all of the candies fell. If you look closely at the photo, you can see a column of spray dropping from the tube in his hand.


  3. An alternative is to set a piece of paper or cardboard over the mouth of the bottle. Remove the card when you want the candies to fall.


  4. We used room temperature soda. Warm soda seems to fizz a little better than cold soda, plus it is less of a shock when it splashes all over you.

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