- 2 ounces blanco or reposado tequila
- 1/2 ounce lime juice
- 7 ounces grapefruit soda (or enough to top off the glass)
- Optional: salt for rimming
- If desired, rim a collins glass with salt.
- Fill the glass with ice and add the tequila and lime juice.
- Top it off with grapefruit soda.