Blue dye contained by drug trial room toilet?

Does anyone know if i dip my cup in the toilet with the blue dye can i after dump it back out or will it dye the cup blue? Need to know because i am telling the errand that my test temp was screwed up because i dropped the cup surrounded by the toilet.
it won't stain the cup but they will know you are trying to beat the system.
they will fire you for trying to beat a drug test. i'm pretty sure you're not the first being to try to trick them. it won't stain the cup but they will know you are trying to beat the system.
Answers:    what a schmuck! why not simply STOP USING DRUGS!
Thats why the blue dye is in near , So drugy's can't cheat