1. Rub a 1 lime wedge around the rim of a highball glass and dip in some salt to create a salt rim.

2. Fill the glass with some ice .

3. Pour 2 oz tequila and 0.5 oz fresh lime juice into the glass.

4. Add 4 oz grapefruit soda and stir gently to combine.

5. Garnish with another 1 lime wedge .