The fun part is watching the bottle swing back and forth like a pendulum while you and your friends bend him over and fuck him in the ass. His dick gets fully hard, except for the first few inches, which are wedged in a glass bottle chastity cage, as he is plowed by random guys. He screams out in agony as the vodka in the bottle burns his piss slit. The six of you make it a game to see how long you can keep him hard, his dick painfully corking the bottle. After eight and a half hours of continuous butt fucking, and seven hands free loads, his cock finally softens enough to let the bottle slip free. His feeling of pleasure at being released from confinement is short lived as you and your friends keep roughly using him as a fuck toy for the rest of the weekend, while getting him drunk on a bottle of cum-infused vodka.