In emergency situations, moonlight reflected off pearly whites creates a beaming beacon that registers in the canine-visible spectrum of light. Equip your smile with potentially life-saving brightness with today's Groupon: for $139, you get a Zoom! teeth-whitening treatment from Dr. Mitzi Morris in Roswell (a $475 value).

Within homey office replete with a couch, plants, and toys for children, Dr. Morris and her skilled staff harness Zoom! technology to brighten smiles up to 10 shades. First, technicians gently cordon off lips and gums to keep them safe from imminent applications of whitening gel. Once each tooth is painted with the stain-busting formula, a special light shines into the mouth to activate the solution's type A personality and corresponding cleaning urges. After basking in fake sunshine, brightened mouth bones cool down with a five-minute fluoride treatment, designed to strengthen grins for impending onslaughts of toothpaste-endorsement deals.