I'm sure many of you know this already, but it's been a life saver for me the past couple of weeks.
I made a couple of rice bags.
a piece of flannel cut 9 x 24 inches. Sew 1/2" seams to make a tube, then sew one end shut. Fill with 2 lbs of long grain (not instant)rice, or you can also use corn field (not sweet corn). Then sew the other end shut.
the bags won't be really full, which is great, because if the were, they won't bend around your neck. I like to freeze them for a few hours, then wear around my neck, but you can also microwave them for a couple of minutes.
You can also make pads out of them if want to use them on your back instead of around your neck. Just thougth I'd share!