Do you drink bottled water? If you drink bottled water instead of tap water, you may not be getting enough fluoride. Many bottled waters do not have fluoride. Before you drink bottled water, read the label to see if fluoride has been added. Fluoride has been added to most public water to help make teeth stronger and protect them against tooth decay. The fewer cavities you have, the more likely you are to keep your natural teeth. Drinking fluoridated water in addition to using fluoride toothpaste or mouth rinses is a healthy habit.