Interested in designing your own car air freshener, either as a fun personal gift or for business promo? The good news is that anyone can design their own personalized car air fresheners, with no graphic design skills required. Here, we’re walking you through how to design your own car air freshener in six easy steps. If quality and value for money are important to you, get your air freshener printed by Make My Freshener. These include the shape of your air freshener (choose between basic shapes like circle and square, as well as fun, custom shapes like pets’ heads) and scent.