I am under constant random testing for my job.I have used the "Urinator "for years with success,(an electronic heated bladder) I use syn urine from cleartest.com,...if you can obtain a clean real urine sample from a friend go ahead and use that, cost about 150.00 dollars, syn urine about 30.00 for 2 tubes.The drinks do work but they can fail also,...I have used an extra strength one hour drink, in combination with herbal tea(used in place of water with the one hour),..kinda pricey this will cost about 75.00 a test, but has worked for me several times,...Good Luck