Get a cheap disposable thermometer like blood drives or school clinics use. Put the piss in a small, sealable bottle, like a small-sized vitamin bottle. Put the bottle of piss in a cup of very hot water for transportation to the site of the test. When you get there, take the bottle of piss out of the hot water and tuck it in compression shorts under a skirt or other loose fitting clothing. Careful not to burn yourself. Go into the bathroom, remove the bottle, then dip the bottle in the sink or toilet to cool it down while checking the temp with the disposable thermometer. When you get to around 100 degrees, pour the piss into the testing cup and dispose of everything else where it won’t be found. Boom.