(h9.5cm) Directions for use:- Place burner on a heat proof surface - Put a small amount of water in top of burner - Pour a few droplets of oil (fragrance oil or essential oil) in the water - the stronger you want it the more drops you put in. (Be careful with essential oils these are pure oils and can have strong effects). Put a lit tea light inside the bottom of the oil burner and let the fragrance disperse gently around your room as the burner heats up. Warning: Never leave a lit burner unattended. Do not boil dry as burner will crack!