Perfume comes in a variety of bottles and sizes; dropper, spray and roll ons. Rollerballs have some pretty awesome benefits! One-they are pretty easy on the pocket book, meaning economical value for the amount of perfume. Two-size portability makes these little "bad boys" or "girls easy to drop into a handbag and go. Three - they hit the bullseye; meaning you are able to easily apply and target directly onto your pulse points. Four - they are eco-friendly, reusable and refillable!