Vehicular add-ons can say many things about a driver, indicating everything from a need for speed and a penchant for flames to a rebellious disregard for sidecar-placement conventions. Let your ride do the talking with today's Groupon: for $40, you get $100 toward a FormulaOne window tint at A Better Tint in Gilbert.

A Better Tint's expedient automotive augmenters coat windows in color backed by a lifetime warranty. High-caliber FormulaOne film confers tranquility and privacy upon cars, freeing drivers from the meddling rays of the sun and constant spying by Santa. The shop cuts all tint with the aid of a computerized pattern maker, which shields steely steeds from potential paint-damaging human error. The light, medium, and dark shades of the Classic Series coating ($99 for two front windows, $129.99+ for trucks, $219.99+ for cars) grant autos an aura of mystery as effectively as a giant question-mark hood ornament, and the nano-ceramic Pinnacle Series deflects heat and UV rays and maximizes visibility ($399.99 for a car or van, $449.99 for an SUV). Depending on the size of the vehicle, the tinting process takes between two and three hours.