In An Emergency, It Can Replace Pepper Spray
The concept of carrying pepper spray around with one all the time is not appealing to everyone, and more to the point, the product is illegal in several places. On the other hand, you most likely have deodorant in your purse so that you can re-freshen yourself whenever the temperature rises.
If you have a deodorant that comes in a stick, roll-on, or spray form, you can easily transform it into a weapon that can be used in place of pepper spray in the event of an emergency. We can only hope that the only emergency for which you will actually require deodorant is sweat marks.