Fill a cocktail shaker with ice cubes.
Add coconut rum to the shaker.
Pour in blue curacao.
Next, add pineapple juice and sour mix.
Put the shaker's lid on securely.
Shake well for 20 to 30 seconds.
Fill a pint glass with ice.
Use a strainer to pour the mixture.
Pour the mix into the glass.
Garnish with a slice of pineapple. Enjoy!