Cars are incapable of regulating their own temperature, forcing owners to tint their vehicle's windows to keep them from driving into fountains. Keep your car cool with today's Groupon: for $50, you get $100 worth of automotive window tinting at Tint Plus in Laguna Hills.

Tint Plus' team of window wizards keeps vehicle interiors cool and glare-free with a selection of glass-tinting options. In addition to giving cars a stylish new look, the darkening films block 99.9% of UV radiation, reject up to 65% of seat-frying heat, and make passengers 100% more like to receive Grey Poupon jars from passersby. Prices vary depending on the number and size of windows on the vehicle, but they start at $100 for two average-sized panes. Also available is the Air Blue system, which provides similar light- and heat-reduction benefits as tinting but in a much lighter package, tinged ever-so-slightly with a touch of light blue. Unlike used cars or the Colossus of Rhodes, all window films come with a lifetime warranty from the manufacturer.