Candle DiffuserEssential oil candle diffuser. Dimensions as pictured are 5. 25 x 4 inches (13. 3 x 10. 2 cm). To use, fill the top bowl with water and add a few drops of essential oils. Place a tealight candle inside and light it. Note that depending on the candle, the water will probably not boil or bubble. It will release scented steam and eventually all the water will evaporate. Both pieces were fired to cone 10 which gets as high as 2381 F (1305 C). All glazes