VORTEX BOTTLES

Materials:

   

Two 2 litre coke bottles, electrical tape.

       
Instructions: Clean off the labels from the bottles. 3/4 fill one of the bottles with water. Tape the other bottle to the top of it. Turn the whole thing upside down and move the bottles in fast circular motions get the water swirling around. Place the bottles down and watch the wonderful swirling vortex effect which is much better than the animation can show.
 
Hints:
Add some food dye to the water for even better effects.
 
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