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Bridging time-telling with the feasibility on whether or not one’s sober enough to drive, Kisai has invented the Breathalyzer Watch. After breathing into the side of the watch, an LED backlight responds, turning green if you’re sober, yellow if you’re tipsy, and red if you’re drunk, in addition to displaying your BAC percentage. Crafted with stainless steel, the watch features an adjustable band and a USB-rechargeable battery that lasts up to a month. The Breathalyzer Watch also comes with usual digital watch features so you’ll know when it’s last call at the bar. Kisai Breathalyzer Watch is now available for pre-orders at Tokyoflash for $100 USD.