The Super Dri-Aid pellets are about 1/8 inch dia. come in jars. Just spread out on a microwave plate, heat, let cool in micro. Place between foam with Accordion on top and close box so it is air tight.
Looks like the rice thing worked. I'll keep this other in mind. There's another thing out there, a canister about the size of a bar of soap. Changes color when it needs to be recharged.
Rice is cheap though. If it changes color, not quite sure what I should do with it, but I think eating is not one of them.