Jamba Juice is offering their Superfruit Smoothies (16 oz) for only $1 on June 16, 2010. They offer 3 choices: YumBerry, Pomegranate, and Acai.
I went to a local Jamba Juice store and bought a Superfruit Smoothies (16 oz) for myself, the Acai flavor. The total was $1.09, after tax. I paid with two U.S. $1 coin, which I bought from the Circulating $1 Coin Direct Ship Program. They accepted the coins with no problem and gave me change in smaller coins.