- 2 oz. Casamigos Blanco or Reposado Tequila
- 1 oz. Fresh Grapefruit Juice
- .75 oz. Fresh Lime Juice
- .5 oz. Agave Nectar
- 2 Dashes Orange Bitters
- Splash of Grapefruit Soda
- Garnish Half-Moon Grapefruit Slice
Combine all ingredients, except grapefruit soda into tin shaker. Add ice, shake vigorously and strain into collins glass. Add fresh ice, top off with grapefruit soda and garnish.