DIY Ice/Cold Packs

Using a clean leftover feeding bag (from a mechanical feeding pump)
or thick freezer bag (small quart size) add the following ingredients:

2 cups water
1 cup rubbing alcohol
Food coloring for the blue tint (optional)

Place in the freezer until frozen or gelled.  Use in feeding
backpacks as cold packs or as swelling reduces/boo-boo
aids.

If using a feeding bag, you can tie off the extension line with a thick piece of twine or yarn, though it is not recommended to cut it off (which may cause significant leaks).