Survival candles are essential to any emergency kit. This 2 wick, wax base candle won't degrade, dry out or deteriorate, we guarantee it. The 4 Candle in a Can will provide light for approx 25-35 hours depending on the number of wicks in use. The reusable, waterproof metal tin that holds the candle, also stores the matches in its lid, so you know your ready and it's perfect for long term storage. Once the candle has expired, the tin can be useful in survival situations.