In a small saucepan, bring 1 cup water to a boil. Add Jell-O mix and stir until dissolved. Turn off heat and stir in 1/2 cup or water and the whiskey. Place 16 plastic shot glasses on a baking sheet and pour in mixture until each is two-thirds full.
Refrigerate until set, about 2 hours.
Top each with a dollop of Cool Whip and gold sprinkles. Place a rainbow candy belt on top, forming it into a semicircle like a rainbow, before serving.