For other methods of passing. some people swear to brushing your teeth and using mouthwash before hand. I also enjoy eating people
Not all that long and that's why they do urine samples because urine is the waste product of the body and it will show up days later.
Once widely used for the testing of illegal drugs, its use is now declining; the time period during which alcohol and drugs can be detected by this method is relatively low, 3 hours to 4 days max.