Good share, i have tried this product a while back and it works perfectly. If i remember correctly a drug test in a lab measures the creatine levels inside the urine to determine if it's real of fake. It should be between a certain level to be human undiluted urine. That's how they make this fake urine by adding creatine and coloring agent. And maybe some other additives that i don't know about.

I can't find the product on amazon.