Thermal Vacuum Cookware: Unplugged Slow Cooker?

Thermal or vacuum cookware works like this: You heat food in the inner pan on the stovetop or on a fireplace hob, and then transfer it to an insulated outer pan, which maintains the heat with no electricity. Find out what this type of cookware is good for, why it's popular in Asia, and whether it's more trouble than it's worth!

Photo by Flickr member kochtopf under Creative Commons

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