How to Create a Tornado in a Bottle

Materials Needed:

2 2-litre pop bottles washed and dried.
1 1 -inch metal washer
duct tape to secure the two bottles together

Process:

Fill one of the bottles with water about 2/3 full.

Place the metal washer over the opening of the bottle.

Turn the second bottle upside down and twist it onto the metal washer.

Use the duct tape to keep the two bottles in place making sure that no water can leak out.

Now turn the bottle so that the bottle with the water is on top and swirl it in a circular fashion to make a tornado inside a bottle.