The coupon is good for any of their burgers in their menu as long as you buy two non-alcoholic beverages (sodas, sweet tea, lemonade, etc...). You will end up averaging only to pay around $5 for an $18 meal because their burgers usually cost $11 to $15 each. One drink usually cost only 2.50 - 3.99 so two drinks at maximum is only $8! Yesterday we only paid just about $12 + tip for almost a $40 meal. Score! :)
Ryan usually orders the Alpine Swiss Burger and I the Avocado Turkey Burger. Delish!