Under the UCC, an affirmation of fact that is part of the basis of the bargain constitutes an express warranty that the good will conform to the facts as affirmed. Prospective Dairy Queen customers were probably relieved to be able to rely on the express warranty springing from the affirmation of facts on the sign pictured below. Perhaps a new slogan might be appropriate for DQ. Here is my suggestion:
If you eat here and die,
It won't be from e-coli.
source of image: http://stevemandich.blogspot.com/2006/10/sign-o-times-1993.html