Going for a buck per 16-oz cup, the chilly beverage looks to be a pre-mixed blend of coffee, cream, and sugar that's poured from a pitcher.
I tried a cup recently and it was very creamy with a decent coffee flavor and a surprising note of salt. The saltiness gave the iced coffee somewhat of a French vanilla note.
Update 8/24/2015 - I reached out to a company rep and was told the iced coffee is not a test product and is available at all locations.