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.

READ MORE: Denver's New Partnership To Offer Alternative Response To Homeless Camps

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

(credit: CBS)

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.

READ MORE: 'An Insult To Hunters Who Follow The Rules': Iniki Kapu Banned From Colorado, Most Of U.S., After Poaching Spree

(credit: CBS)

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.

(credit: CBS)

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

MORE NEWS: Colorado Consumer Advocates Share Top Complaints In 2020

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