16 Low-Cal Versions of Your Favorite Summer Cocktails

A riff off a classic tiki cocktail called the "Zombie." I served a variation of this cocktail at Aspen Food & Wine this year. Traditionally, this drink is a very strong one, but I've stretched it out with watermelon juice.Ingredients:1.5 oz Mount Gay Eclipse silver rum0.75 oz lime juice, fresh squeezed0.75 oz simple syrup1.5 oz watermelon juice, freshly extracted0.25 oz pink grapefruit juiceFloat of overproof rum (optional)Sliver of watermelon, for garnishSimple syrup: 1 part water: 1 part white sugar. Combine the sugar and water. Stir until completely dissolved. You can also heat on stovetop to dissolve faster.Directions: Combine all the ingredients (except the overproof rum) in a cocktail shaker. Top with ice and shake vigorously. Strain into a tall, iced Collins glass. Garnish with watermelon sliver and float with overproof rum, if desired.