I think it's safe to say that you know at least one person who is on the smile train. They strive to get the whitest smiles and always seem to have perfectly pearly whites. I can't complain - my teeth aren't horribly discolored - I don't drink soda, but I am a coffee drinker, so I do have a little staining. It's no biggie - no reason to get a professional whitening treatment, but enough to make me want a slightly whiter smile. I knew I could ...