Question about urine substitution and temperature!!!!!!

I wanted to know if anyone could recommend i guess any small heating pads to keep the urine at the right temp to substitute for a drug test. I've seen those urinator products online but they cost alot of money. I have a drug test to take in a couple days and I have no choice but to sub. So I really need to know if there is anything thats affordable that I can use to keep the ruine at the right temperature.
-I saw that for women we can put it under our breasts to keep the urine warm but I'm kinda scared that this wont work. Is this method foolproof??? So I just keep the bottles under my breast with a bra and pour into the cup and is it guaranteed to be the right temp?

If anyone has any info PLEEEEEASE help me. I would REALLY appreciate it!!! Thanx

well get a three ounce CLEAN bottle. if you do not feel comfortable putting it inside you..yep in there. heat it up in the microwave for like 7-12 seconds, depending on microwave strength, then put the bottle inside your panties and go take the test right away.

Hmmm...I'm not sure if you'd be able to get any of these, but I remember I used to see heated pads to put in your gloves during the winter time. If you could find any of those then thats probably what your looking for.