Microwaveable hot/ freezable cold packs

[i-am-a-cashew.livejournal.com]

Hi guys...
I'm looking to make one of those eye mask-like things out of something that I can put in the freezer to get cold to help me with my headaches... which i have bad right now... something that would have some weight to it, and get nice and cold...

also, I'm wondering, for a heat pack, would lentils work? I've got a ton of lentils here that nobody's gonna eat, and I figure, its a seed of sorts... actually, its a legume, but it doesnt matter... actually, would dried beans work? I've got a ton around, I've got some I use to blind bake pie shells with, but, they smell wierd after baking, but I think that microwave zapping wouldnt make for the funny smell so bad...

ok, lemmie know what you think
--Cashew