The W. W. Stool by Philippe Starck
Philippe Starck originally designed this piece for film director Wim Wenders where he required a fantasy office environment as a set piece. There were a few different pieces of furniture that Starck designed for this project, this one being called the WW Stool. Soon after this designed entered production.
The fluid tentacle design was not only designed as a pretty set piece - it does also function as a usable item of furniture although it will normally only be comfortable for users who prefer to almost stand against the bar stool rather than sit down.

