Start with the blue layer: Blend blue curaçao, blueberries, 2 oz rum, 1 oz lime juice, and ice until smooth. Pour into glasses, filling about a third of each. Pop them in the freezer for 15 minutes to let things set up.
Next, the white layer: Rinse out the blender. Blend coconut cream, 2 oz rum, 1 oz simple syrup, and ice until creamy and smooth.
Layer it up: Take glasses from the freezer. Using the back of a bar spoon, slowly pour the white layer over the blue. That spoon really helps keep the colors separate. Freeze again for 10 minutes.
Now the red layer: Clean the blender (again, sorry). Blend strawberries, 2 oz rum, 1 oz lime juice, 1 oz simple syrup, and ice until smooth.
Finish the layers: Pull glasses from the freezer and gently pour the red layer over the white, using the back of your spoon.
Garnish: Top with fresh berries and, if you’re feeling festive, a tiny American flag.