Sure, guys. That's called cozy cooking.
You have those small microwavable single serving macaroni and cheese, rice, beans, whatever over there in NZ? I carry those fishing. My wife crocheted me a cozy that they fit in, so all I have to do is dump in boiling water and close the cozy.
I'm given to understand that thermal cookers are popular on private ships and such when the galley cannot be attended all the time, and where a lot of the cooking is done with relatively low BTU alcohol instead of more dangerous fossil fuels and their gasses.
This type of cooking is excellent for lightweight camping as well. You have to carry less fuel and dirty fewer dishes.
Regards,
Josh
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