Pineapple juice is by far one of the most popular mixers for rum, and we can see why. It’s fruity, refreshing, and makes you want to sit on the beach for hours sipping under the sun. A Couple Cooks says these two ingredients are simply meant to be, with flavors that just fit well together naturally. The end result is sweet, tropical, and goes down incredibly easily — don’t say we didn’t warn you.