Emergency Whistle

thingiverse

A whistle universally recognized as a distress signal is often small enough to attach to any object. Attach it easily to a zipper, key-chain, or similar item. If lost in a forest, stranded on a ski slope, or feeling uneasy in a dark alleyway, having this tool nearby can be a big help. The bottom of the whistle should face down when printed; please note that the whistle is positioned sideways in its STL design.