The ingredients in a Strawberry Acai Refresher from Starbucks are as follows:

• Ice
• Strawberry Acai Base (water, sugar, white grape juice concentrate, citric acid, natural flavors, natural green coffee flavor, and fruit and vegetable juice for color)
• Real strawberry pieces

The Strawberry Acai Base contains natural flavors, including passion fruit and acai notes, and is lightly caffeinated with green coffee extract. Some copycat recipes suggest adding additional ingredients such as peach, blackberry, or coconut milk.