Caution: this smells! Listerine came up with a great idea to promote their long lasting mouthwash. It starts with an ordinary flipbook, but uses technology to add scent to the pages. The book depicts a beautiful woman, who appears to be giving off a foul onion smell as she speaks. Not only does this leave you with a lasting reminder about the importance of fresh breath, but the promotional coupon at the end of the book turns this impression into a likely purchase!