Final answer:
To create a layered effect in the juice drink, ice should be added before the chilled water.
Step-by-step explanation:
To create a layered effect in the juice drink, the ice should be added before the chilled water. According to the recipe, after filling a tall glass 1/3 of the way with orange juice, ice cubes should be added. Then, the sports drink is poured slowly over the ice until the glass is 5/6 full. Finally, chilled water is added over the ice to fill the remaining space.