The Tornado Tube

Watch as gravity can turn two soda bottles and water into a tornado!

What you’ll need:

  • Two clear soda bottles
  • Duct tape
  • Water
  • 1 inch washer

Instructions:

  1. Wash the bottles making sure to remove any labels.
  1. Fill one bottle with water almost to the top.
  1. Place the washer on top of the mouth of the full bottle and then put the empty bottle’s mouth on top of the washer.
  1. Tape the two bottles together securely to make sure there will be no leaks.
  1. Swirl the bottle and watch as a tornado is formed!

A water vortex funneling between two glass bottles

How it Works

The water going through the washer from one bottle to the next forms a vortex. A vortex is a type of motion that causes liquids and gases to travel in spirals around a center. Gravity is what pulls the water into the hole so the vortex is formed. When there is a vortex in the bottle the water pours faster into the next bottle and allows air to pass through the middle of it.

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