Rum a lime wedge around the rim of your serving glasses and then dip into coarse salt. Fill each glass with ice. Set aside.

In a pitcher, mix together orange liqueur, tequila, lime juice, and sugar. Stir until sugar is completely dissolve. Stir in orange juice.

Pour into the prepared glasses. Add 2 drops of grenadine syrup into each glass and wait until the grenadine settles at the bottom before serving.