C-light candles meet almost all the criteria — they are made responsibly from natural , renewable sources using green energy. And when the candle is burned, all the waste can be reused or composted the industrial way. The waste that is left after burning the candle is only a cup and a metal wick holder. The holder can be easily detached and brought to the iron waste disposal while the cup can be disposed at the general waste container. The cup should not be placed into any of the household compost, green waste or plastic containers. A used cup is suitable only for industrial compost.