I have a good (clean!) friend that I can can get urine from. I plan on getting it from her as close to the pre-employment test as possible and dropping it 'down my drawers' to keep it warm. As temperature is the most important issue at this point, where can I get those temperature strips they have on their sample bottles?

Do drug stores sell them or would I have to buy them on the internet??
Baby forehead "stick-on" thermometer strips can be found at most chain pharmacy stores.