Combine ¾ cup orange juice, 1 ½ ounces silver tequila, and ½ ounce Grand Marnier in a cocktail shaker with ice. Shake vigorously. Pour into the prepared glass.
Slowly add the ½ ounce grenadine to the cocktail near the side of the glass and allow it to slowly run to the bottom of the drink.
Garnish with Maraschino cherries and an orange slice. Serve immediately.