Used as a natural body warmer and also for heat therapy treatment. Useful in case of joint pains, muscular cramps, menstrual pains, muscle pull, stomach and back aches, arthritic and rheumatic pains, bed warmer, sports aches and pains. Hot water bottles soothe and calm children. - Hot water bottle can be used alone as a remedy for aches, pains and sports injuries. - A hot water bottle is a time-honored method of treating sore muscles, stress or cramps, arthritis, aches and pains, stiff necks, lower back pain, menstrual cramps and other common aches and stresses of everyday living. - Hot water bottles are easy to travel with, especially on a long flight or bus ride.