Pic Solution Hot Water Bag With Cover bags designed to hold hot water safely, they are for applying to pain points on your body to bring you quick relief. Easy to use, effective do-it-yourself heat therapy. They relieve pain caused by muscle and neck tension, arthritis, cramps or period pain. When applied to the pain point, they relax your tissues in a completely natural way. A simple and effective traditional remedy. Thanks to their special construction, they’ve been designed for maximum heat retention, with a reinforced metal screw cap that eliminates leaking so there’s no risk of scalding. One last secret? The surface releases heat gradually, for ongoing relief that grows by the minute.