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Diet Coke and Mentos

Bring out your inner mad scientist by creating a mini eruption with this easy experiment.


Tools and Materials

  • 2-liter bottle Diet Coke
  • 1 roll Mentos candy
  • Large plastic test tube

Diet Coke and Mentos How-To

Be sure to do this experiment outside as it will cause a considerable mess if done indoors.

  1. Open 2-liter bottle of Diet Coke and place on a firm, sturdy surface.
  2. Put Mentos candies into test tube.
  3. Invert test tube and quickly drop all Mentos candies into soda bottle and step back.

Note: For our mad scientist lab experiment, we used a Martha Stewart 3,000mL flask, 3 liters of Diet Coke, and 1 1/2 rolls of candy.


3,000mL flask available from Martha Stewart for Grandin Road. Large Plastic Test Tubes available from Martha Stewart Crafts. Mentos, Diet Coke, and all other tools and materials available from your local grocery store and/or drugstore.