Beginning today at participating retail locations, Starbucks offers the Starbucks 16-oz. Grande Frappuccino in Caramel Cocoa Cluster (winner of the Flav-Off flavor competition) for just $3 from 2 pm to 5 pm. That's a savings of around $2. Deal ends July 6.
Note that not all locations are participating and you may want to call ahead to confirm this promotion is available at your location.