Now you have NO excuse for drinking and driving! NDrive G400 PND is a personal navigational device with an extra bell and whistle. It has a built in breathalyser! Imagine that!
It can show you were to go, how to get there and when in doubt, when you should call a cab or someone to pick you up. Just touch the application, then blow into the device itself once it calibrates. I mean really! Partying will never be the same. Think of all the money you'll save not having to pay fines and all the jail time you'll avoid.
Seriously, this device should be a standard feature in all vehicles and learning how to use it part of the purchase deal.