Booze up all you want, just don't drink and drive. Ask someone else to be the designated driver if you're planning to get wasted. If that person happens to be you (for the rest of your friends), then be a man and stop the tap before you've reached your limit. And just to make sure that your BAC is still within legally-defined limits, you'll need to use a breathalyzer.
Few people would actually think of investing in a portable breathalyzer, but Kisai has made it easier for all of us by incorporating one into a stylish wristwatch.
The watch is called the Kisai Intoxicated, which is pretty ironic since the goal is to prevent you from becoming intoxicated in the first place.
The digital display makes it easy enough to read the time off of the watch whether you're drunk or sober. When you need it to check your breath, just open the sensor cap and push the 'alcohol' button to start the test. The display towards the right will then show you where your sobriety currently stands. Just keep in mind that green is good, yellow means you're borderline, and red means you'll have to hitch a ride home or crash at someone's place for the night because you're not fit to drive.
Get It: $149