2 straight walled, 2 liter bottles with caps
5 minute epoxy (about $4.00 at craft stores)
Small paper cup
½ drill bit
Sand paper, medium grit
Food coloring (your choice of color)
Clean the labels off the 2 liter bottles. Leave the white plastic ring on the bottle. It will help hold the caps in place when you are ready to make a vortex.
1. Using the drill, drill a hole in each cap. Match the holes up and then mix the epoxy in the small paper cup, with the toothpick.