The answer is marijuana, i'm not sure if this is correct
Hope this helps! :)
Happy New Year
Aspiration of Urine can be obtained by catherization. This procedure is performed by using a sterile urinary catheter inserted into the urethra into the bladder where gravity will pull the urine into a collection device. There is another type of aspiration that can be done using a very long needle inserted via puncture into the bladder but this is more invasive & not the first choice.
I may be wrong, but I think it's Antibodies.
One suggestion is to ask them nicely. Or another suggestion is just put them in your room and hide them