See how to make a very refreshing rum cocktail with a watermelon twist. All you need are light rum, lime juice, simple syrup, and watermelon puree. To make the watermelon puree, simply whip up slices of watermelon in your food processor. It’s super easy and so refreshing—the perfect drink for summer sipping. Watch the video, then get the recipe for The Guatermelon Especial Cocktail. This one’s a house cocktail of the R Bar in New Orleans.