Collins or Highball Glass
- Measure tequila, juice, and Proof Syrup into shaker; add ice and shake until well combined.
- Strain into an ice-filled Collins or highball glass; top with grapefruit soda.
- Garnish with lime wheel.
Variation: For a less-sweet, lower-calorie cocktail, increase the Citrus Sour or Margarita Proof Syrup to a full ounce and use grapefruit sparkling water instead of soda.