Serve hot pack

These products are made of nontoxic and innocuity color PVC, more colors, more beautiful ,more styles, and you also can design your own pictures or LOGO on them, suitable to be used for gifts ,sales promotions, advertisement ,and so on.
Usage :
Just need to break the inner iron with fingers and thumb again and again., it will make hot as soon as possible, then we can apply to human body to get warm or to help therapy.