If you're around water a lot, for example if you're a boat owner, you probably want to be extra careful with your small belongings. Cell phone, PDA or even your Nintendo DS is doomed when dropped in the water. But your keys can be saved with this Key Buoy self-inflating key chain. The Key Buoy is relatively small compared to other key saving gadgets. Once dropped in the water it will inflate its bright orange buoy and float around for 40 minutes, which should be enough to jump in to the rescue. It's good for one single use. The Key Buoy is sold for $ 6,99. The image below shows how it works.