This is a really simple oil lamp made from a metal spacer and some rolled up toilet paper. This would be a great emergency light while camping.

This is a simple but very sweet project. I was playing about with oil and wicks on new years eve 2006 and came up with this idea for metal candles that can be re-used, and burn ordinary cooking oil or other suitable fuel like liquid paraffin.
It basically involves an easy to roll paper wick and a sleeve that holds it together and allows it to wick the oil up while retaining a constant burning area.

Simple and sweet oil lamp – Link

Related:

Candles from scratch, CRAFT Vol. 04, page 124 – Link