Just got back from my pre empoylment DOT test, used the quick fix and the urinator, good thing i bought two bottles of the quick fix cuz i needed every drop, collector didn't even put a line on the cup ! said gimme all ya got, then split the sample four ways, had just enough!!! never seen that before an i've taken about a dozen of em. 4 OZ. of quick fix $80.00, urinator 150.00, peace of mind knowin I'm clean an have my job, priceless, masks don't work trust me, ya might get lucky! but if your cronik never, an always bring more than enough quick fix !!