This tiny flamethrower is made for concealed carry. It can easily be stored in a pocket or a purse. A great gift for self-defense.

It is made out of a 3-D printed casing, with a modified adjustable lighter. To make it, get an adjustable lighter and modify the gas valve to release more gas. Then put it in the 3-D printed casing.

 

How to modify the lighter;

How to Make a Lighter Shoot a Huge Flame: 9 Steps (with Pictures) (wikihow.com)