3/4 cup water
1/4 cup rubbing alcohol
2 ziplock bags
food coloring (optional)

Pour the water and the rubbing alcohol into a ziplock
storage bag, add food coloring if desired, then close.
Put the bag into another bag, seal, and place in your
freezer. This will make a nice, flexible, slushy ice
pack. (Be sure to label the contents clearly so that no
one will try to use it for anything edible.) Double or
triple this recipe as needed to make the correct size
to fit the area needing the ice.