Made of high-density PVC, which is not easily destroyed, long service life, safe. With high-tightness bottle stopper design, it will not leak. The cold and hot water bottle with wide mouth is easy to fill and use. Use it for treating sore muscles, stress or cramps, arthritis, aches and pains, stiff necks, lower back pain. Gifts for women menstrual cramps and common aches and can also double up as a cold compress for person with fever, to reduce swelling for minor injuries, and warm your body.