When a state sees as much sun as Florida does, you can take great sunsets for granted. Except this one.
Combine orange juice and rum. Set aside 1/3 of the mixture. Pour 2/3 of the orange juice mixture into 2 ice-filled glasses. Set aside. Mix reserved orange juice and rum with 2 tbsp. grenadine. Slowly pour into each glass so it settles on the bottom, creating an ombré effect.
Garnish with lime slices.