Prefilled 8 mL diffusers that clip onto a car vent, with setup instructions included in the packaging.
Try removing a filter to see more scents.
Car Diffusers
Remove the wooden lid, pull out the white stopper and attach the metal clip around the threaded top of the bottle. Replace the wooden lid, insert the reed sticks into the holes on the lid and clip the diffuser onto a vent in your car.