By Tori Mason

The Colorado Department of Transportation is offering a discount on personal smartphone breathalyzers until Saturday. The sale is part of CDOT’s summer campaign to end drunk driving. More than 2,200 people have already taken advantage of the discount.

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DENVER (CBS4) – CDOT representatives were outside Coors Field before Thursday’s Rockies game, offering fans free blood alcohol content screenings.

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Many were shocked at the results.

They said seeing those numbers light up after blowing air out makes you more aware of how much you’ve really had to drink.

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The smartphone breathalyzers are compact and easy to use. They’re great to take with you to sporting events, a night out or wherever else you might be drinking.

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A quick test could be the difference between thinking you’re fine to drive and a DUI. Or worse — hurting yourself or the people around you.

The breathalyzers are normally $100 but you can get one for just $50 until Saturday through

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Tori Mason is an award-winning reporter for CBS4 This Morning. Follow her on Twitter @ToriMasonTV.