Looking to make sure your car is smelling delightful for those upcoming road trips? These are perfect for housewarmings, birthdays, and any special occasion. We strongly recommend purchasing a diffuser for EACH scent. Mixing fragrances will not produce the intended scents. These diffusers measure approximately 1 inch wide and 3 inches tall including diffuser reeds. DIRECTIONS: * Unscrew the wooden top. * Pull out the plug. * Fill with your favorite oil and carrier oil. * Replacing the wooden top. * Turn the diffuser over and allow the oil to absorb into the wooden top. The more oil that is absorbed, the stronger the scent! * Enjoy!