2- cups of water
1/3- cup (80%) alcohol- rubbing alcohol or vodka, etc.
Zipper- top plastic bag
Combine water and alcohol in a zipper-top bag. Seal top and freeze. The alcohol keeps it from freezing solid and creates a gel-like ice pack. You can add food colouring to the water to your liking for something different. Be sure to label your bag so you know what it is. Contents are not to be swallowed.