The hot water bottle is ideal for general use, providing relief from pain and discomfort through local heat. By using hot water, it induces vasodilation and muscle relaxation, thus alleviating the feeling of pain. Its use is simple and quick. Make sure that the water temperature is below the boiling point and fill the bottle while holding it by the neck. It is important not to fill the bottle more than 2/3 of its capacity, and to be cautious when releasing the hot air, keeping it away from your body.