Hi friends NEED your help over the summer when we were at the Ex I saw these neat heating pads that were like a jelly rectangle shape that had a silver disc in them that you snapped and it activated the heat of it and it instantly turned into a hot heated pad...Does anyone know where abouts around here I can purchase one??? When they cooled off you just put it in hot water and re-snap the disc and its hot again....Arm and neck injury and need to get one...thanks