Obviously, bad dental hygiene can lead to cavities and gum disease, but here's a list from Health.com of eight surprising things that can also be bad for your teeth.
#1.) Bottled Water. About 60% of people in the U.S. have fluoride in their tap water, but most brands of bottled water don't. So if you ONLY drink bottled water, you might not be getting enough fluoride to protect your teeth from cavities.