A latte a day could send you straight to the dentist's chair. That's the upshot of a new survey that found as fancy coffee drinks have become more popular, there's been a big jump in adult tooth decay. So, what's so bad about a latte? Experts say it's not the drink that's causing cavities. All coffee drinks are packed with acid, which eats away at your tooth enamel. The difference is that a lot of people quickly down a coffee. On the flip side, a lot of latte drinkers take hours to finish, savoring every sip through a tiny hole in the drink's lid, just like a toddler uses a sippy cup. That means our teeth are exposed to the sugar and acids more directly, and over a longer period of time, which eats away at tooth enamel. And that's exactly why dentists everywhere are fighting to recognize lattes as a sugary snack, like a candy bar. But latte lovers - that doesn't mean you have to give up your coffee habit. Instead, the key is to acid-proof your teeth. How? Dentists recommend drinking water after every sip of a latte to help wash away the acid.