This candle lamp's Liquid-Glow Paraffin Plastic cartridge is filled with Neo-Image's trademark Liquid Glow Paraffin Oil. It is smokeless and odorless. The mini oil lamp replaces a standard size tealight candle which will fit into any votive/tealight candle holder or candle lamp. The cartridge is disposable and should not be re-filled. The space saving design provides small table footprint cost effective lighting option liquid glow cartridge contains clean and pure burning liquid paraffin.