oh we do luv refreshing rum drinks while soaking up the summer sun--but alas, juices and mixers make them so calorie-heavy. Make a 10 oz glass of sugar free lemonade such as Crystal Light, add a shot of spiced rum, a shot of coconut rum and just a splash of pineapple juice -- shake it up with ice and serve over ice - makes 2 short drinks or one tall one. Garnish with a pineapple chunk on a pick and a cocktail umbrella. Low calorie? Not hardly because of the alcohol -- but it is refreshing, tropical and has less calories.