Step 1.
- Fill a cocktail shaker with ice.
Step 2.
- Add 1.5 ounces of Pisco and 1 ounce of vodka to the shaker.
Step 3.
- Squeeze in the juice of half a lime (about 0.5 ounces).
Step 4.
- Shake well until chilled.
Step 5.
- Strain the mixture into a highball glass filled with ice.
Step 6.
- Top with soda water to taste.
Step 7.
- Garnish with a lime wheel.