sparkling waterany flavor such as lime or grapefruit
salt, lime wedgesoptional garnish
To rim the glasses, gently moisten the rim of four glasses with a lime wedge. Pour about ¼ cup of salt on a plate then gently move the moistened rim around to coat with the salt. Fill each glass with ice then set aside.
In a cocktail shaker, mix together tequila, lime juice and grapefruit juice with ice. Shake well then pour mixture over four glasses, about ⅔ full. Top each glass with sparkling water to serve.