Whistle if You Need Anything
Since the invention of 3D printers, many creations have emerged. The printers are simply amazing and can build pretty much anything you can dream of. Yes, even houses. Well, someone decided to put their printer to good use and build something that can be used in an emergency – just check out this backpack that has several clips on it which also are whistles.
It doesn’t add anything extra onto the backpack or any extra weight, but simply modifies the clip to be utilized as a whistle if needed. This could come in handy for a child that may be in a crisis, a hiker that may be lost in the woods, or even a girl walking alone at night. It could also be useful if you happen to be wearing this backpack and come across someone having a medical emergency – you can use the whistle to get attention and seek help.