The Solum Lux Merus diffuser comes with a natural, light pine, cylindrical base and a hand-blown glass bottle. Unlike most other diffusers, the Solum Lux Merus contains no plastic parts that would corrode when in contact with the oils. With proper care, your diffuser can last for many, many years. ArOmis diffusers use no heat or water to function, keeping the essential oil in its natural state as it becomes a mist.