You don't have to blow into a tube, it will sniff the air near the driver for alkyhol. It also has sensors in the wheel to see if your hands have been drinking.
This means you'll have to drive with the window down, a hose on your face to the outside and wear some gloves.
What a pain!

Everyone knows when you're drunk your engine runs smoother.
Libbo rats are always telling you how to live as they careen drunkenly home from some tax payer sponsored dinner party.