A shoulder bag with a new concept that allows you to carry a hot water bottle with you without having to worry about it. A small hot water bottle with a capacity of approximately 600ml is placed inside the bag, which is made of boa material that gently transmits heat. By adjusting the length of the shoulder strap, you can place the hot water bottle on your stomach, back, or other areas of your choice, allowing you to spend time at home with others.