Ingredients
2 oz. reposado tequila
Juice from 1/2 a lime (save shell for garnish)
1 pinch salt
Grapefruit soda (Jarritos is preferred)
Large ice cubes or single long spear
Glass: highball
Garnish: squeezed-out lime shell
Preparation
Pour tequila and lime juice into glass and add ice, salt and garnish. Fill with grapefruit soda.