Add 1 tablespoon of coconut syrup, 1 tablespoon of lime syrup, and 2 tablespoons of blue raspberry syrup to your serving glass. Give the glass a small swirl to spread the syrups around the bottom.
Slowly pour Red Bull into the glass until it is nearly full, leaving enough room for the ice. Pour gently to help keep some of the fizz.
Add as much ice as you like, then give the drink a gentle stir to mix the syrups with the Red Bull. Avoid stirring too hard so the drink stays fizzy.
Take a small sip and adjust the flavor as needed. Add more blue raspberry syrup for extra fruit flavor, or use less syrup next time for a less-sweet drink. Change one syrup at a time so you can easily adjust the flavor.
Give the drink one final gentle stir and check that the syrup is mixed well. Add a little more ice if needed, then serve the Rebel cold.