In an attempt to transform billboards into the number one public health problem in the country, marketers have come up with the idea of lickable ads. Since scratch-n-sniff stickers were such a huge success it seems like the logical next step. Welch's has jumped on the bus and is taking out full-page print ads in People magazine this month that give readers a chance to sample its grape juice by licking the ad. Lawyers for Wonka Industries say they are looking into the ads for possible patent infringement issues and that the snozberries do indeed taste like snozberries.