You got seriously ripped off. I get randomly drug tested because of my school and I make something similar to that except it is free. Yours is only slightly better because if someone is standing behind you. The only weird thing is that since you wear it high up under your shirt, it won't look like you're pissing if someone is behind you. It's better than mine because it's in a bottle and I have to dump it in the cup rather than having a tube like yours.
It would certainly not work if they stood in fron of you but no one does that.