guiness draught now comes in bottles not just cans. So, my roommate being the ever curious about such things quickly downed one of my six pack and smashed it to bits in the backyard to disect its secreats.

Sure enough. There is a small plastic container of nitrigen inside. Looks like it works just like the ball inside the cans, only this one is shaped like a stick of lipstick.

When science meets beer. Be there when it all goes wrong.