Open lid, insert standard 12 oz can, pop the top, cheers, repeat. I've been looking for a legit stein for quite some time now, something with some heft, great design, and able to hold quite a bit of drink. This clever plastic beer holder/stein will have to do until I find the stein of all steins. I'm think I'll paint the one I just ordered a matte white. The ThinkGeek Das Can-in-Stein started off as an April fools prank and after an insane demand it became an actual product on their website.