As candle lovers ourselves we got tired of buying candles that did not burn right and eventually throwing them away, OR we got tired of those nasty black jars AND we found out that those black jars were harmful to our health (we were actually breathing in that black soot - ewww who needs that?) So now we can burn candles that smell great ALL the way to the very end and will actually burn straight to the bottom of the jar...and best of all, we can say " bye-bye" to those nasty black jars =)