used it to make an ice pack
Put 80% water and 20% glycerin (by volume) into an ice pack, and voila, you now have an ice-pack that you can re-freeze.  No need to put cubes in there every time.  Just throw it right back in the freezer.  The glycerin acts as anti-freeze.  It will get semi-solid, in the freezer, but still remains pliable, kind of like firmly packed snow.  You then massage it a bit, so that it becomes soft again, and voila, you have a very cold ice pack.  (Even colder than regular ice.)<br /><br />The product is non-toxic, and I do not believe that it goes stale or spoils.  Basically, should last forever.  Preferably, use purified water, so that it won't spoil.<br /><br />If you want it softer, try 75% water, and 25% glycerin ratio.  That should work well.  If it gets too hard, then let it thaw, pour out some of the mixture, and add in a bit more glycerin.  If it is not thick enough, then add in more water instead.  Let it re-freeze, and there you go.
Rating: 4 stars