Our car diffusers have a jute adjustable tie cording, wooden elements and a stylish glass container.  The fragrance oil resides in the glass container and you control the amount of scent release with the included plug.  Simply remove the plug and allow the fragrance to pull up into and saturate the wooden top!  The fragrance could last up to 2 months or depending on the temperatures or how much you like to release at a time.  We have lots of fragrances to choose from!
 
CAUTION:  Take care when removing the plug from the diffuser and when hanging in your vehicle.  Any fragrance oil that drops onto your dash or console may harm the surface!