Have you seen this?

[Techno]

What about the urban myth of leaving a tooth in Pepsi or Coke overnight...and it completely dissolving ?
Anybody tried that with one of their offspring's baby tooth offerings from under the pillow ?
Sounds a load of you know what to me 
Cheers - Phil

[goat major]

another way to test that is to take a mouthful of coke (without swallowing) just before you go to sleep and see if you have any teeth left in the morning

[clibinarium]

Snopes to the rescue again;
http://www.snopes.com/cokelore/tooth.asp

No doubt its high sugar content and acidity aren't good for teeth, but then again orange juice probably isn't either.

[Hertsblue]

Do you think Pepsi have a skunk-works somewhere churning out all these rumours?