Jolly Rancher Watermelon Jello Shots Ingredients  Bring 1 cup of water to a boil. Add jello. Then pour in 1 cup of Malibu Watermelon Rum. Stir. Add jello to condiment cups.  Place in refrigerator to harden.  Once jello has hardened, place a gummy Jolly Rancher on top and enjoy.