<br><b>AIKOTOO Multi-functional Hot Water Bottle</b><br> <br>AIKOTOO hot water bottle is made of 100% natural rubber and wrapped with a cute knitted protective cover. It's commonly used to keep you warm in cold weather, but now it's widely used as a remedy for aches, pains and sports injuries as well, such as back, neck & shoulder pain, muscle sore, menstrual cramps and tension. Besides the traditional hot therapy, it can also double up as a cold compress for kids with fever or to reduce swelling for minor injuries.