The flavors being tested are: Strawberry Banana; Greens, Banana & Pineapple; and Mango Pineapple (Starbucks current regular menu smoothie flavors are: Chocolate, Orange Mango, and Strawberry).
Beside the juice, the smoothies each contain two types of fruits and Greek nonfat yogurt. They each clock in at 250 calories or less.
The smoothie test is ongoing at participating Starbucks stores in San Diego and Baltimore.