The Fashy hot water bottle is ideal for general use and provides relief from pain and muscle tension. Thanks to its design and the use of water, it can locally heat various points of the body, causing vasodilation which helps relax the muscles. It is easy to use, simply fill the hot water bottle with water, ensuring it does not exceed 2/3 of its capacity. Make sure the water is below boiling point and that the cap is securely tightened to prevent any leakage.