I actually just went through the very same thing. It was a home-test and the sample had to be delivered to the lab within 1/2 hour. To increase difficulty level I live in a fairly rural area the sample could only be dropped off between 11:00 and 11:15, so I had to get the timing just right. The test literature said that the sample must be "kept warm" so I tucked the container under my arm pit on the drive to the bio testing facility.

I did some speeding during the drive and when I got to the lab, on time and under budget, I was thinking "man good thing the cops didn't pull me over or that would have been an an epic story!" Since I had the container under my arm pit I'd be like "you don't wanna frisk me right now... trust me!"