Captain Morgan Watermelon Smash A fruity rum with the rich aroma and flavor of fresh watermelon. With the juicy taste of fresh watermelon, it makes for an explosively delicious shot. Stored in a sweetly scented, festive bottle, this gluten-free shot makes a refreshing and fun summer beverage. Captain Morgan Watermelon Smash Rum Tasting Notes Nose : Strong note of fresh watermelon. Palate: Sweet taste of watermelon. Finish: Refreshing, crisp finish.