With the lid off the Hand Warmer, hold the base unit with one hand and apply flame to the catalytic burner unit for 20 to 30 seconds using the other hand. Flame can come from a Zippo lighter or other lighter. Keep hands and clothing away from any flame. After ignition has been confirmed, replace Hand Warmer lid, let the unit heat for 1- 2 minutes (NO LONGER!) then, taking care in handling the Hand Warmer, carefully place it into the provided bag. The Hand Warmer must always be placed in the provided bag to prevent over-heating. Your Zippo Hand Warmer will now provide comfortable warmth. After ignition, heat is provided by a catalytic process without flame. Once ignited there is no way to stop the heating action. If necessary, place the Hand Warmer in the bag and place on a fireproof surface until the fuel is exhausted and the Hand Warmer is cool to the touch.

Yes. All lighter fluid will evaporate in time. Please fill before using Hand Warmer.

If you fill the plastic filling cup to the lower line, the Hand Warmer will keep heat up to 6 hours. If you fill the plastic filling cup to the upper line, the Hand Warmer will keep heat up to 12 hours. Please be advised the heat time will vary. It may last a little less or more than advised.

No, the Hand Warmer generates heat only when an external source of flame is applied to the burner to begin the catalytic process.

Yes. The Zippo Hand Warmer requires oxygen for the heating process to occur. The bag regulates the amount of oxygen. Do not use it without the provided bag because it will get too hot.

Once the Hand Warmer is ignited there is no way to stop the heating action. If necessary, place the Hand Warmer in the bag and place on a fireproof surface until the fuel is exhausted and the Hand Warmer is cool to the touch.