Step 1: Make mango daiquiri: Add rum, Cointreau, lime juice, mango, sugar, and ice cubes to a blender. Blend until creamy and smooth.
Step 2: Fill glass halfway: Pour the mango mixture halfway into a long drink or Hurricane glass.
Step 3: Make strawberry daiquiri: Add white rum, strawberries, lime juice, and ice cubes to the blender. Blend until smooth.
Step 4: Layer the drink: Slightly tilt the glass and slowly pour in the strawberry daiquiri for a layered look.
Step 5: Garnish and serve: Add a straw and decorate with half a strawberry. Serve immediately.