The Chiller Pillow is a convenient way to relieve sore muscles, sooth migraines, tired feet, reduce fevers and more. It works with regular tap water or ice water, depending on your needs. The cooling effect can aid to relieve painful muscles, sports injuries and more. Perfect as a cooling pad for electrical equipment or simply to cool down your pets on scorching days. It is portable and convenient, you can take it anywhere and starts working as soon as you add water. Tired feet, no problem, you can lie down with your feet propped up or simply place it on the floor. Even great behind your back in the car to aid in soothing and relaxing tired muscles.