How long will someone else's urine last for a drug test?

Someone else's urine for a drug test will last about 10 seconds. Urine samples are checked by temperature as soon as they are collected. Urine that has been INSIDE your body is significantly warmer than urine in a baggy in your pocket. You are trying to fool drug screeners who do this all day long. If you want to pass a drug screen, stop doing drugs.