It's easy to drink more than usual when you travel. One moment you're having a few drinks and telling stories with new friends at a bar, and the next thing you know it's almost morning, the table is littered with empty bottles, and everyone begins to go to their separate ways. But are they sober enough to drive? You can be the hero of this party with your portable breathalyzer. This police grade device wirelessly connects to your cell phone via Bluetooth and works like a charm to detect blood alcohol level (BAC). Too drunk? You can even call an Uber right from the breathalyzer app.