My car fresheners are made with essential oils and other ingredients. They are designed to hang from your rearview mirror in your car, from the movement it put a wonderful scent throughout your car. I have been told by customers that they last at least two months. They work on the same premise that a home diffuser works  instead of bamboo sticks you have a bamboo cork on top of your bottle that works as your diffuser , they come in a variety of scents. They come in these beautiful  diamond shape bottles. I also have customers that use them in their closets where they’ll hang them and go every couple of days and turn them upside down for a couple of seconds to diffuse their closets.