Quote Originally Posted by circmand View Post
A BAC test shows your Blood achohol content at the time of testing. If you do it at a bar right after your last drink it will read one thing but your BAC will actually continue to rise until all alchohol has been absorbed into your system.
Good information! I would never have considered using it when I knew I "had" to drive. A better application would be to do it at home when there is no need to go anywhere. Try out a few different situations, time frames and alcohol consumption to get a good feel for BAC with no worries.