A bright blue Refresher drink is coming to Starbucks this summer that draws inspiration from Taiwan, with boba pearls. It hasn’t been announced by the coffee chain yet, but baristas have leaked the fruity beverage online early – and it looks delicious. Starbucks’ Summer-Berry RefreshersA staff poster shows two variations of the blue Refresher, the Summer-Berry Refresher and Summer-Berry Lemonade Refresher. Both of them are sky-blue icy drinks with red tapioca pearls at the bottom, making them a bit like bubble tea. TRY THIS: Secret Starbucks drink that tastes exactly like Nutella will be your …