I stopped drinking
diet soda a few months ago. I used to go through a couple of 2-Liter bottles a day. I had no idea why my teeth were in such bad shape when I have never had much of a sweet tooth, But after reading some stuff on the net about about the acids in soda, I quit cold turkey and now drink mostly water.
Soda cans have a thin lacquer lining on the inside to prevent the acids from chewing through the can.