Welcome to Custom Breathalyzer Systems Why not test yourself with one of our Custom Breathalyzer Systems Vending Machines if you have been drinking to make the roads and highways safe for everybody CBS sells alcohol breathalyzer testing machines, which can be located in drinking establishments, to provide customers and patrons with access to an alcohol breathalyzer testing machine. It allows them to test themselves and get their own %B.A.C (blood alcohol content) in their body before they ever get behind the wheel of a vehicle and endanger themselves or innocent people. Alcohol affects different people in different ways. If you feel like you have had too much to drink, don't drive, and always be responsible and safe when you drink alcohol. Never drink and drive, be Safe!.