Place your serving glass in the freezer for about 5 minutes until it feels cold and slightly frosty.
Fill a cocktail shaker halfway with fresh ice cubes to quickly chill the drink.
Add the coconut rum, peach schnapps, blue curaçao, sweet and sour mix, and lemonade to the shaker.
Seal the shaker and shake vigorously for 10–15 seconds until the outside becomes icy cold.
Fill the chilled serving glass with fresh ice, then strain the cocktail over the ice for a bright, clear finish.
Garnish with the orange slice, maraschino cherry, and fresh mint if using. Serve immediately while ice cold.