3 lime wedges
kosher salt for rimming glasses
4 fluid ounces white tequila
1 fluid ounce orange flavored liqueur (such as Cointreau®)
2 limes, juiced
8 fluid ounces grapefruit juice
3 splashes club soda
Rub a lime wedge around the rims of 3 margarita glasses, and dip each glass rim into salt. Place ice cubes into each glass.
Mix together the tequila, orange liqueur, lime juice, and grapefruit juice into a pitcher, and pour into the glasses over the ice. Add 1 splash of club soda to each glass, and serve.