When we give our new hires the paperwork, it includes the drug test paperwork as well, as they go to a lab.

I too was wondering about the 2oz when I got tested. So I bought 2 QuickFix. I got a 3oz shampoo bottle and had 3oz to give when I went to the lab. The guy told me to fill to the line and I only used half.... so 2oz would definitely have been enough for me!