The Sony W series is a completely waterproof (up to 2 meters) mp3 player that Sony has been offering for a while. they actually market it for swimmers but its great for anyone exercising in wet, humid or outdoor environments.
The marketing whiz-bangs at New Zealand ad agency DraftFCB came up with an original bottled Walkman concept. The Walkman is sold from a vending machine stored inside a bottle of water.
Sony has installed these vending machines in places where its target demographic likes to frequent (gyms, pools, etc). The packaging conveys a clear message that is understood immediately and they get a 100 points for originality.