Hot water bottle design hand warmer to keep yourself warm in all weather conditions.... To use each heat pad, you just click the small silver disc inside it and this causes the chemical reaction to start... Watch chemistry in action as the incredible heating process takes place. The pad reaches a temperature of 130 degrees Fahrenheit within 5 seconds, and stays warm for about 45 minutes. After it becomes cool, you can easily recharge it by boiling it water for a few minutes. This simple process makes it reusable again and again. The hot water bottle hand warmer measures 11.5cm x 6.5cm (Colours vary).

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