Patriotic Punch, a fun, layered drink for 4th of July.
When you prepare the drink, the order is ice, red liquid, more ice, blue liquid. You only need a few drops of blue food coloring. If you use too much, it will sink down and turn the drink purple. The amount of sugar in the layers is key. More sugar is heavier and will be the first layer. Less and no sugar will be the top layer.