1/2 lime, cut into 4 wedges, divided
10 fresh mint leaves
1 tablespoon white sugar
3 ice cubes
1 fluid ounce light rum (such as Cruzan® Aged Light Rum)
1 1/2 fluid ounces mango-flavored rum (such as Cruzan® Mango Rum)
3 fluid ounces seltzer water
Place 1 lime wedge and mint leaves into a rocks glass; muddle to release oils and juice, about 10 seconds. Add sugar and 2 lime wedges; muddle to release oils and juices, about 10 seconds. Stir mixture until sugar dissolves. Add ice cubes and pour light rum and mango-flavored rum over ice; top with seltzer. Stir drink gently for 2 seconds. Garnish drink with remaining lime wedge.