1-1/4 cups sugar
1-1/4 cups water
6 cups crushed ice, divided
3/4 cup rum, divided
3/4 cup Triple-sec, divided
6 lemons, halved, divided
Dissolve sugar in water in a small saucepan over medium heat, reduce heat to low and simmer 3 minutes. Transfer syrup to a bowl, cool completely.
Fill each jar with 1 cup ice, 1/3 cup prepared sugar syrup, 2 Tbsp. rum and 2 Tbsp. Triple sec, squeeze juice of 1 lemon in each jar (reserve 6 squeezed lemon halves). Cover jars with a tight fitting lid and shake vigorously to combine.
Top each drink with club soda and garnish with a reserved squeezed lemon half.
Makes 6 drinks
Serve this drink in a quart canning jar also used as a shaker.