This handy "candle" will outlast a 3 day emergency. Burns liquid paraffin for over 100 hours of light. It is also odorless and smokeless, making it a great emergency light source. Keep one handy with a book of matches taped to it for your next power outage. The liquid fuel is sealed inside, with only the wick exposed. You can extinguish, and use again and again. A very safe source of light!