Step 1.
- Fill a highball glass with ice cubes.
Step 2.
- Pour in the rum over the ice.
Step 3.
- Squeeze the fresh lime juice into the glass.
Step 4.
- Top it off with soda water.
Step 5.
- Stir gently to combine the ingredients.
Step 6.
- Garnish with a lime wedge on the rim.