How does a glass oil burner work?

You fill the glass bowl with water, add a few drops of fragrance oil, and place a lit tealight underneath. The flame warms the water and oil, and scent rises into the room.

Does it need electricity or batteries?

No. It runs on a tealight candle only, so there is no cord, plug or battery. That also means it gives no mist and has no timer or settings.

Which oils can I use in it?

Standard fragrance oils for oil burners work. Use them diluted in water as intended, and keep the bowl from running dry.

Is it safe to leave burning unattended?

No. It has an open flame and hot glass, so keep it on a heat-safe surface, away from curtains and children or pets, and put it out before leaving the room.

Let it cool fully, pour out the water, and wipe the bowl with a soft cloth and mild soap. Avoid cold water on hot glass, which can crack it.

Is glass better than ceramic or electric?

Glass lets you see the water level and flame, and it is silent and cord-free. Ceramic hides the level, and electric diffusers add mist and timers but need power.