Relieve muscle pain and swelling easily with the help of this Injury Ice Bag Reusable Bag! You can also use it as a heat bag! For cold compress, simply fill the bag with ice cubes, crushed ice, or cold water and seal it tight. While for a hot compress, fill it with warm water for up to 40 degrees Celcius. The bag itself is washable so you can reuse it without a problem.