A few weeks back we were at a press event and saw the BACtrack display for their new C8 police-grade breathalyzer device that features something they call ZeroLine. BACtrack is the #1 seller of breathalyzers in North America and was founded in 2001. Their new C8 builds on their past expertise by adding ZeroLine, which gives you an estimate of when you'll be sober. Turns out it might be longer than you think.