A friend and physical therapist gave me the best formula for making your own reusable ice pack.
Seal (a) 3 cups water and (b) 1 cup isopropyl alcohol inside (c) 2 freezer bags.
It’s simple, flexible, and can mold to your body quickly.
Take it out of the freezer, mash it up a little so it’s flexible, wrap it in a dish towel, and wrap it to your body with an Ace bandage.
My daily companion. A must have.