Living in cab-and-subway-centric New York City, one does not often have the need for a pocket breathalyzer. However, that doesn’t mean we haven’t enjoyed busting out the AlcoMate Premium ($190) at parties. It’s high-tech, easy to use and—for those who have no sense of their tolerance—quite eye-opening. Because let’s face it, as much fun as it can be to compare BACs, the real value of this product is preventing DUIs—and saving lives.