Ingredients
2 oz blanco or reposado tequila
6 oz fresh grapefruit soda (like Fresca or Squirt)
1/2 oz lime juice
Salt for rimming (optional)
Note: a mix of grapefruit juice and a splash of soda may be used if grapefruit soda is not available
Preparation
Rim a collins glass with salt. Fill the glass with ice and add the tequila and lime juice. Top it off with grapefruit soda.