This deal has ended.
Jamba Juice has a printable coupon for "buy one get one" on their new Functional Smoothies (the line includes smoothies with names such as "Heart Defender," "Coldbuster" and "Protein Berry Workout"). You'll get one free 16oz. smoothie with the purchase of any Functional Smoothie. The offer can be used more than once but only once per visit. It expires 10/16.