Sometimes, especially during the holidays, the Quantified Self \u2014 the popular movement in which you track your activities using gadgets like a Fitbit \u2014 transforms into the Inebriated Self. \u00a0\n\tWhen that happens, it\u2019s time to blow into a small gadget that analyzes your breath for its Blood Alcohol Content (BAC). The device, which looks as if it were designed to light electronic cigarettes, is called the BACtrack Mobile Breathalyzer ($150).\n\tVia Bluetooth, BACtrack connects to its free namesake app on your iOS device. An Android app was recently released as well. After initiating the connection, the app gives you a countdown timer. When the time is up, blow into the BACtrack device\u2014and trust me, you need to blow as hard as possible. Within a few seconds, the app will give you a BAC reading as well as an interpretation of the BAC number.\n\tFor example, on a recent night out, I had two cocktails with dinner, strictly in the spirit of research. I waited for 15 minutes after drinking and eating, which is what the app recommends. Then I went to the restroom and blew into the Breathalyzer. (I don\u2019t recommend using the BACtrack in public, unless looking like a drunk nerd is your style).\n\tOn this occasion, I received a reading of 0.09, which meant my \u201cjudgment is impaired and motor skills debilitated.\u201d It\u2019s also above the 0.08 BAC limit in California, where I live, though the app didn\u2019t tell me that. Rather than, say, using GPS to determine your location and the state\u2019s BAC limit, the BACtrack app simply tries to discourage anyone from driving with even a 0.01 reading.\n\t\u201cIt is unsafe to drive at any intoxication level,\u201d a reminder states. \u201cWhile you are under the legal driving limit, you can still be arrested for DUI at (the 0.01) level.\u201d\n\tI understand and appreciate BACtrack\u2019s intent \u2014 you don\u2019t want to inadvertently encourage someone to get behind the wheel because they\u2019re still under the state\u2019s legal BAC limit. At the same time, if the app and device\u2019s ultimate purpose is to discourage anyone who\u2019s had a drink from driving, will people pay $150 for that?\n\tMore to the point, I suspect the $150 price tag will deter many casual drinkers from using the BACtrack\u2019s Mobile Breathalyzer. That\u2019s too bad, because knowing your BAC in real-time could help save lives\u2014or at least prevent an unfortunate DUI arrest.\n\tUltimately, if you\u2019re into the Quantified Self movement and want to exercise caution when drinking, I think the device is worth the investment. The app tracks your drinking habits by location, date and time, type of drink, and other criteria. If you\u2019re feeling bold (or boozy), you can even share your BAC results via Facebook or Twitter. But in my opinion, sharing BAC feels like TMI.