In your baggie, mix 2 cups of cold water with 1 cup of rubbing alcohol.

Then add about 5 drops of your chosen food coloring (optional).

Then seal and place it in a second freezer bag to prevent it from leaking.

Once your ice pack is frozen, place it inside of a Food Saver bag and vacuum seal it. (Use your Food Saver instruction manual for specific directions on vacuum sealing items.)

Then your ice pack is done!