In a cocktail shaker filled with ice, mix the orange juice, tequila, grapefruit juice and lime juice. Shake vigorously for ten seconds then pour into a glass or cazuelita filled with about 1/2 cup of ice. Top with 4 ounces of Sparkling Ice Peach Nectarine, then garnish with nectarine and citrus slices, and a sprinkle of tajin.