found something thatadvises they make a good filling for a hot/cold pack...We're talking low-tech here; going back to something natural--You'd cool or heat this up (not in a microwave) and then apparently the inner seeds retain a special quality of heat...
I'm pretty low tech in lotsa ways so this appeals to me;
I have a very small buckwheat pillow; might have to get a bigger, more normal one soon. I'm getting older and my futon seems to be slanting almost head-down...