Movie stars maintain gleaming-white grins not only to look good on the red carpet but also to double as flashlights during haunted-house investigation scenes. Become your own beacon with today’s Groupon: for $68, you get an in-home Icing teeth-whitening treatment from Bling Dental (a $199 value).

Bling Dental creates a custom tray that fits your teeth and gums as perfectly as a cozy winter tongue mitten. Clients can then apply Icing gel at their leisure in the comfort of their own home. The carbamide peroxide in Icing whitens mouth ivories without the high-intensity lights used in expensive in-office treatments, and its numbing potassium nitrate reduces your teeth's sensitivity to heat, cold, and the presence of poltergeists. Each kit includes enough Icing gel for 12 treatments. Most Icing users notice visible results after a single 60- to 90-minute session and only require touch-ups once a year. Check the FAQ for more details about Bling Dental's Icing whitening treatment.