Emergency sea water demineralizer
A life jacket might save more life in the shipwreck, however, since the rescue workers will not come to help you immediately, you need fresh water to continue your life. This device will give you distilled water which is the most important for every survivor. Additionally, this device will emit the light at night and colorful smoke at day to indicate your location.
Source: inewidea.comAdded: 17 December 2008