1st off if you can find someone to piss that is clean use theres.In a 2oz shampoo bottle.Well cleaned.
If Not you can have Quick Fix Overnighted to your home.
(May cost a bit more over night but) Should allway keep some around.
http://www.detoxforless.com/pass-a-d.../fake-pee.html
Comes with a heating pad.Or you can buy them at wal-Mart,Or any sporting goods store.They take about an hour to warm it up to temp.

Just pass it off at the right Temp. and you good to go.

And Masking it just sends up red flags at a lab.

What your taking is a SAP 5/50 W/NIT
and they will find dilution and or masking 90% of the time.

SAP 5-50 W/NIT
SAP = Substance Abuse Panel
5 = Five types of drugs being tested
50 = 50 ng/ml cutoff limit for THC
W/NIT = with Nitrites check. The labs will be checking for excessive amounts of this component to determine adulteration.

Q: Can they tell if its Synthetic Urine?

Quote: Yes, there is a way to tell if its synthetic but labs are bound down by regulations and protocols which dictate what they can test for and what not. Labs (US) are only allowed to test for drug metabolites and check the Ph, specific gravity, creatnine and excessive nitrites. As long as the batch of QF is fresh and not exposed to direct sunlight, it will pass these integrity checks. If the batch is old or had been exposed to direct sunlight, the components break down, sending up a red flag with the lab tech.

Use it.It works!!!!