01 - Fill two old-fashioned glasses to the top with crushed ice and set aside.
02 - Combine orange juice, pineapple juice, lime juice, orgeat syrup, and simple syrup in a cocktail shaker. Shake vigorously for 10–15 seconds until well chilled and blended.
03 - Strain the mixture evenly into both ice-filled glasses, dividing between them.
04 - Slowly pour 0.25 fl oz grenadine into each glass, allowing it to settle at the bottom for a beautiful layered effect.
05 - Top each glass with an orange slice, a maraschino cherry, and a fresh mint sprig. Serve immediately with a straw.