i assume your parent do not watch you actually take the test. unless it is that important to them that will actually look at your dick (pretty sure it said u were male) while you pee in the cup, if they did im sorry but thats kinda messed up, whole other deal. use either someone else's clean urine or some synthetic urine and bingo your golden (no pun intended).
have you asked them why they care if you take molly
. assuming you are 18, cant you sit down as an adult and talk with them intelligently. obviously if the only drug
in your urine is molly for a couple days after you go to a concert it doesn't sound like you have a drug problem, though i could be wrong. idk i guess i might take my relationship with my parents for granted, who used to give me tests but lightened up in high school and let me do my own thing.
anyway id say using another persons pee is the best option. with the synthetic urine if your dad stands in the room but doesn't watch you it has a little tube which can be tied to your dick and concealed very well. so unless someone looks at your penis while you pee in the cup, that should work, and if they do i think they need to take a look at their priorities, lol.