Caffeine will not cause a false positive in drug tests.
Yes. You will fail your urine drug test for meth amphetamines.
no
Not as long as it really is urine and there is no dope in it.
no
Yes or no
Yes
penis
One
yes
No
Urine test will show both and without a prescription for both you will fail test
Only if you want to fail the test and be exposed as a cheater - cooked urine will be obviously different from normal urine.