This is a bit of weird concept. Made by a Japanese company called Hum, with the actual product itself called “blank”. The USB itself is built into the cork, which you then put inside a glass bottle with nothing else in it.
Even though the USB is 2GB, this has absolutely no practical aspect to it whatsoever, and you might baulk at the huge $41 dollar price tag. Even though I suspect that for the average person this is useless, if you like minimalist/Japanese creations and have money burning a whole in your pocket, this is the USB key for you.
I imagine the design would actually go quite nicely with a Mac, but for me, the price tag is a big no no.