The new iPhone iBreath Breathalyzer - this sense, the next gift?

IBreath iPhone / IPod alcohol breath analyzer wish list this year? Or buy it for the driver of legal age, who care about you? In any case, I ask you this ...What is the purpose of the IPod with breathing? This question arose in my head when I read about the newest IPod accessories. I would think about putting into the ring to help people to reduce driving under the influence, but I do not think