Frozen
Ready to potentially get a mouth fill of piss? Perhaps you took on the earlier challenge and have been sucking your piss inadvertently for weeks but a fresh glass is totally new experience. Ready?
1) Select one glass at random, take it to the sink and pour it away.
2) Select a second glass and pour it over your head, perhaps some will go on your lips. Is it piss or water?
3) Select another glass and down it all at once do not stop until it is empty or you fail the task. I hope it's piss.
4) Select a fourth glass and pour it away
5) You should now have two glasses left, I don't know if they'll contain piss or water and hopefully you don't either. One glass you pour down the sink the other you will down just like you did with glass three.