"Hangover Whopper" campaign of Burger King in Brazil offers a discount depending on customers' hangover level by using facial recognition technology. The campaign runs through a special microsite that measures the degree of hangover from customers' selfies. As a result of the photo evaluation, select discount coupons and menu combinations for Jr Double Whopper, Whopper and Double Whopper are offered to customers. The amount of discount received varies depending on the hangover level.

After you upload a drunk photo to the website, the website evaluates your hangover level on a scale of one to three. Based on the evaluation, it offers you a discount coupon and menu combination. If you seem like hangover you look in the photo, the more discount you get.