I'm a former toxicologist who ran a GCMS Lab that tested for drugs of abuse. The temperature strips on the bottles we used registered from 92-100 degrees, to the best of my recollection. Get a thermometer, strap the bag on for an hour or two, then simulate dispensing it into a 4-6 ounce cup and measure the temperature. If it reads below 94 degrees it will probably work. My guess is that it will be under 90 degrees, in which case it will not. There is NO product that will mask a positive drug test. Golden Seal is just a myth. I put it to a test and it had zero effect. In a pinch, you can try adaulterating the urine with one small drop of liquid soap. The urine will screen positive, but it will make the job of the chemist in the confirmation lab miserable, and they may not be able to figure out the problem and have to report you out negative. Soap will lock water into it's matrix and will pass through a C8 or C18 column used in the separation. This small amount of water will prevent the derivitzation reaction with BSTFA necessary to do the GCMS confirmation. You may have to pay for the confirmation after failing the screen. Remember they are 2 different things. The screen is usually by enzymatic assay. The confirmation is done by GCMS. It is the confirmation that the soap will screw up. You only need a very small amount. Don't over-do it or you will get busted when the chemist can smell it. That's how I figured it out.