These handy little guys are ready to keep your vehicle smelling fresh with your favorite Ol'Factory Candle Co. scent. But no need to stop there. Hang them in coat closets, lockers, office cubicles, or any other small area that you want smelling nice. Each diffuser is sold with a plastic stopper to ensure that no oil is being used until you remove it yourself. And considering they last several months, they're extremely cost effective - not to mention a hell of a lot more stylish than a cardboard tree.