drug test question

ok taking a drug test
got a friend donating me some clean urine and i have one question about this

the temp
what temp should it be
and should i keep it cold until the morning
and then warm it up in the morning
microwave and then handwarmer?

just looking for some advice from someone who's done this before
thanks

The temperature is supposed to be body temperature....98.6
It can get cold, in fact you should stick it in the fridge until the night before, then leave it out, and before you go microwave for 6-8 seconds depending on your microwave.