juss use anythin that can fit a lil bit ov yer piss. im not sure how long piss takez ta go bad, but ull b fine if u get the clean piss rite b4 u go into work. and yoshi, drinkin water helpz becuz, well first ov all, thc iz water soluable, but piss test dunt test fer actual thc, they test fer metabolitez er sum shit that r left in the system an eventually pissed out after smokin bud. i beleive a blood test is only way to test fer actual thc. anywayz, if u drink alotta water, u will flush these metabloitez er wutever they called out quicker az u will b pissin alot more frequently. itz called dilution.
PeAcE