You can create this dramatic display with just two 0.25-ounce vials of blue dye you may already have in the kitchen. Set out six 12-ounce glasses, labeled A through F. Add one cup of boiling water and two teaspoons of white vinegar to each and stir, using a separate spoon for each glass.
Then, mix in the color as follows: A, two drops; B, six drops; C, 10 drops; D, 20 drops; E, 45 drops; F, 60 drops.