Regular (raw) rice will not cook sufficiently in the cozy--it comes out basically still raw. It takes about 20 minutes of cooking to cook raw white rice and about 40 minutes for raw brown rice, and that's at sea level.

The only alternatives for reconstituting rice in a freezer bag or the cooking pot are either to use Minute or Uncle Ben's "instant" Rice, or to cook and then dehydrate your own rice beforehand. Ms. Minute and Uncle Ben basically have done these steps for you, but some of us think the results aren't as tasty as the home-prepared rice. YMMV.

Even with Minute/Uncle Ben "instant" rice or the home cooked/dehydrated version, you need to allow 15-20 minutes of cozy time.