A glowing smile charms irritable librarians, stern highway-patrol officers, and judges with highfalutin ideas about driving through the library. Flaunt your beaming beauty with today's Groupon: for $59, you get a 20-minute teeth-whitening session at Winning Smile (a $129 value).

Discolored teeth enjoy brightness bolstering at Winning Smile, where careful technicians assist patients in a fast and safety-centred session that whitens choppers three to eight shades. Clients apply a carbamide peroxide gel to both rows of teeth, and the gel is then secured with a mouthpiece tray free of allergens such as silicone, latex, PVC, and tooth-fairy dander. The lightening liquid works together with superpowered LED light to speed up the stain-vanquishing process to approximately 20 minutes. The treatment can render red wine, coffee, and cigarettes a yellowed memory, and very few patients report tooth sensitivity or late-night incisor sobbing. Like many teeth, the whitening trays are Canadian-made, ensuring high standards of production and safety.