2 tablespoons tequila
2 tablespoons lime juice
1 tablespoon orange-flavored liqueur
About 1/2 cup chilled sparkling water
Rub the rim of a glass (12 oz.) with a cut lime and dip rim in coarse salt. Pour tequila, lime juice, and orange-flavored liqueur into glass. Place watermelon ice cubes in glass and fill with chilled sparkling water.