I have GOT to stop drinking sodas.

Trying to figure out which was worst for my teeth - coffee, tea, soda - and apparently soda is the hands down "winner." Coffee and tea may stain your teeth, but soda eats away your enamel, stains your teeth and gives them a lovely permanent yellow luster. At least I don't drink the citrus sodas. [Hi Sandy.]

Healing Water Machines Health Blog: Why Soda is Bad for your Teeth:

"Yellow stains aside, brewed coffee or tea may not be the worst thing you could swish past your pearly whites. Other drinks tested in a recent study produced much more wear and tear on tooth enamel, especially bubbly soft drinks.

But here's the surprise: It didn't matter if the sodas were diet or not. When your tooth enamel starts to erode, you've got major problems on your hands. And certain foods like sweets and sodas may hasten this process. All carbonated drinks in a recent study had some impact on tooth enamel (with the one possible exception being root beer -- its impact on tooth enamel was slight). Citrus-flavored sodas hit teeth hardest, but colas caused problems, too. And it didn't matter if the drinks were diet or full-sugar...

The total acid content and acid type -- look for names like phosphoric, citric, malic, and tartaric -- in a beverage affect how strong the attack is on your choppers."