Step 1: Chill your glass by filling it with ice and letting it sit for 30 seconds.

Step 2: Discard the water from chilling and add fresh ice to fill the glass about three quarters full.

Step 3: Measure 1.5 ounces of rum using a jigger.

Step 4: Pour the measured rum slowly over the ice, tilting the glass to prevent splashing.

Step 5: Top with 4 to 5 ounces of chilled cola, pouring slowly to preserve carbonation.

Step 6: Stir gently with a bar spoon for 10 to 15 seconds using a downward motion.

Step 7: Hold a lime wedge over the drink and twist sharply to release the oils onto the surface.

Step 8: Garnish with the lime wedge on the rim or dropped into the glass and serve immediately.