Simply fill the ice pack two-thirds full with ice and water to relieve discomfort from headaches, bruises, muscle aches, and swelling. Discomfort may trouble you anytime, anywhere. Keep a handy ice pack in your offices, cars, or at home for grab-and-go relief from pains. Made of waterproof, safe, and soft-touch rubberized fabric, makes the water stay cold much longer. The Superior Leak-proof Cap with a large opening is for easy filling of ice cubes or crushed ice.