Ceramic essential oil burner: each of our candle holders is hand-made and the lavender oil burner is made of high-quality porcelain covered by a layer of glossy mineral glaze. The set includes a pair of candles to use with the censer and a bottle of lavender oil. The great 2-piece design will make it easy to clean if needed. Easy to use and multifunctional: your ceramic oil diffuser can work as a candle wax warmer as well. You just need to put the usual spoonful of water and a few drops of aromatherapy lavender oil (5 to 10 drops, depending on the desired intensity of scent) into the top cap-bowl and light one of the candles, and place it inside the holder.