A mixture of blueberry juice and a mild (not overpowering) orange soda. I use Polar diet orange soda. This recipe is the end result of my twenty-five-year quest to discover the recipe of the drink Pinky Surprise , mentioned on the TV show 'Private Benjamin'. This is the closest I've come to what I believe the Pinky Surprise might be. You might also want to try substituting pink lemonade for blueberry juice.