All these arguments about CY being more expensive than non-CY might not be relevant in the case of Starbucks, the Baristas have no vested interest in savings Starbucks the few pennies difference in price. If the CY is successful the managers will be so satisfied with the increase in sales that they won't think twice about the minor cost differential of the CY-milk. Or, said a bit differently, the cost differential of a few cents is insignificant when Starbucks is selling you a $5 Venti.