White Castle Offers Free Mints

White Castle is taking full responsibility for the predicament its customers find themselves in after eating the chain’s onion-laden burgers.

The Columbus, Ohio-based fast-food retailer is offering free breath mints with the purchase of its “Onion lover’s special,” which includes eight hamburgers, two orders of onion rings and two 20-oz. drinks. The “After Crave Mints” come in a specially designed miniature tin that bears the White Castle logo and tagline, “What you crave.”

J. Walter Thompson, Detroit, the retailer’s long-time ad agency, has created two 30-second TV spots, radio ads and point-of-sale materials to support the limited-time promotion, said Jamie Richardson, White Castle director of marketing.