Frigo Cheese Heads has changed their $1 off coupon to .40 off. That might seem like bad news at first, but it is actually no so bad since it still prints with no size restrictions which means possible FREE string cheese singles at Walmart and other stores! Here is your Walmart scenario:
Frigo String Cheese, Singles .40
-.40 Frigo Cheese Product Coupon
Please keep in mind that Walmart prices can be very regional, so this scenario will depend on your location.
(Thanks Coupon Katarina!)