The May 2011 issue of Martha Stewart lists “10 Feel-Good Things to do This May” and item #8 is to Strengthen Your Smile. “Keep your teeth in top shape: Limit your intake of acidic drinks, such as orange juice, soda, and bottled iced tea, which can ‘attack enamel, softening it and making it more open to the bacteria that cause cavities,’ says Jennifer Jablow, a New York City dentist. When you do have these sips, rinse your mouth with water afterward to help wash away damaging acidic residue.”