"It was a stainless steel disc with a slitty hole in it. The slitty hole was where the smeggy dregs of dried coffee and mouth slime had congregated into a foul smooky gook that stubbornly clung to the cup, like menstrual clots to an unwitting man's penis after some parting the Red Sea action."
Damn, I got way too much of a visual on that one haha
I can only hope that what you saw wasn't half the foulness of what I saw!! :0D