This is a remix to smooth out the roughness and to include the Solidworks 2014 source of the Emergency Whistle by muddtt @ http://www.thingiverse.com/thing:494695
From his description - A whistle is universally recognized as a distress call. This tiny little whistle can easily be attached to a zipper, key-chain, or any other object. So whether you get lost in a forest, need help on a ski slope, or are nervous in a dark alley, this is a great tool to have.
Per a request I received I have added a .STEP version.