The Perpetual Candle is made of glass and contains a handmade solid wick. All you need to do is fill it with liquid up to nearly the tip of the wick, but leaving enough of the top of the wick uncovered to be able to light it. The liquid should be 3/4 tap water, and 1/4 Madalura London scented oil. You put the water in first, then top up with the oil, and then light the wick. Hey presto, you have a candle that can last for up to 9 hours before the oil needs to be topped up again.
When you wish to extinguish the candle, you can simply blow it out. Alternatively the candle will self-extinguish when the oil layer runs out.
The Perpetual Candle can be used again and again – just fill up the candle with tap water and a layer of scented oil, as explained above.