Simply add a few drops of essential oil to the top of the diffuser. Being a porous surface, the oil seeps into the hinoki wood and naturally lift off and infuse the space with the aroma. No fire or electricity required. They are subtle so we recommend using them in a space space like a bedroom or bathroom.

No heat, water or power required. 

The hole underneath the diffuser is designed to hide your bottle of oil. 

Hinoki wood (Japanese cypress, hinoki cypress or hinoki; 檜 or 桧) is a species of cypress native to central Japan and widely cultivated in the temperate northern hemisphere for its high-quality timber and ornamental qualities.