Things You'll Need
Instructions
Remove the label from one of your bottles and use some soap and water to wash off any sticky residue. Do not do this for both bottles because you can use the label of the other bottle as a measuring point.
Fill the bottle with the label with water up to about an inch from the top of the label. Fill the bottle to the top of the label with vinegar and add a ½ a tablespoon of liquid dish soap. Add two tablespoons of glitter and five drops of blue food dye as well.
Place the other two-liter bottle atop the one you've filled up connecting them at the mouths of the bottles. Wrap thick packing tape around the area you've connected them and down the nozzles. Wrap tape eight to ten times around this area to ensure a watertight seal.
Remove the label from the bottom bottle and wipe with soapy water to remove residue. Slowly turn your bottle creation upside down so that the mixture begins pouring from the top bottle into the empty bottom bottle and watch as a tornado happens.