This traditional Puerto Rican cocktail tastes like a very thick and creamy coconut eggnog. It's very rich, so you can serve it over ice, if preferred, to dilute it a little. Feel free to increase or decrease the amount of rum depending on how strong you like it. The drink keeps in the refrigerator for 1-2 weeks. Pro tip: It's great for gift-giving! Simply place in a decorative glass bottle with a stopper for a delightful Christmas gift.