Olive, olive oil

I've just purchased an olive oil lamp. It is a moderately sized jar with a handle on the side and a lid. It contains a wire, bent and coiled in such a way as to hold the wick upright near the bottom of the jar, and also provide a handle with which to lift the apparatus. When in use, one removes the lid, lifts the wire, cleans and trims the wick if necessary, and lights it. It cost only a few dollars, but a similar one could easily be made at home with a jar, a wire and a proper kind of string. It provides more illumination than a candle, and olive oil burns cleanly, with almost no smoke. An inch or two of oil will provide several hours of use.