I get through far too many candles and especially tea lights - I do recycle the wax as far as possible but it's an expensive addiction and not terribly green. Most candles are made from petrochemicals but there are also ethical issues regarding soy wax and beeswax. These last two are also pretty pricey.
Someone mentioned on a forum I frequent that she used an olive oil lamp so, the seed having been planted, I went in search of some inspiration. I mentioned my plans on another forum and a member kindly posted her partner's method so thank you Connor.
This is simply a small glass jar with a metal lid. This one held harissa paste originally and it was the only small one I had to hand with a suitable lid - I hadn't realised how many small glass jars now have plastic ones!
I raided my candle making supplies for some wick and the kitchen for some olive oil. Then it was just a matter of making a hole in the lid, pulling some wick through and filling the jar with the oil.
I didn't colour the oil although I will as "someone" seems to have borrowed all my food colouring . She knows who she is!
I will also add some essential oils to it now I know it works (and keep an eye open for a fancier bottle).