Hi is the strawberry açaí refresher from Starbucks kosher for Passover – And the ingredients for the base are listed as water, sugar, white grape juice concentrate, citric acid, natural flavors, natural green coffee flavor, fruit and vegetable juice, and rebaudioside A (which is basically a form of Stevia)
Eileen Missry 
T Aharon 
Barbara Hidary
Kosher for Pesach for all