UKH

Hi,

I have a stainless steel thermos food flask and was wondering if I took the lid off it,could I heat the contents up on a gas stove?

I have this one : PKjSL_pAjQjFd4Y0qHLB9tnTXpSgUaAjbqEALw_wcB

Cheets

Make sure it doesn't have foam in the vacuum part.

You probably could, but the heat exchange would be so inefficient that any weight saved by not carrying a pot would be negated by the extra fuel consumption.

A vacuum flask - I think you'll find the clue is in the vacuum.

I had to laugh at this​, sorry.

The whole point of a vacuum flask is to stop heat getting from the inside to the outside and vice-versa. It you were looking for a way to put something​ on top of a stove without it getting hot, putting in in a vacuum flask would be your best bet!

Thanks for the replies.

Sorry, I forgot to say that the flask is now redundant, I don't have the lid and didn't want to throw it away.

So, was just wondering if I could have re utilised it.

How are you fixed for vases?

Mmm, don't have any vases, but have Auntie Mable's urn.😀

Pierce the vacuum cavity and pour molten copper inside it.

I think I might have pondered it in the past, but on taking the base off an old vacuum flask to look into removing a dent in it, I found that the base was glued on. There might be foam, glue, or inefficiency involved in the end.

Problem solved!
Put Auntie Mable in the flask and use the urn to cook with.

As someone else pointed out, given that the design of a vacuum flask is almost solely to prevent heat ingress, of all the things you might re-utilise it for, a stove pot is the least likely do be of use.

Switch the urn for the flask!

you could make your flask into a stove

https://www.instructables.com/id/Backpacking-Gasifier-Stove/

You'll need to mount the flask on a turntable (or possibly a treadmill)

I have a stainless steel pan.  Could I use it as a vacuum flask even with the lid?

Maybe I'm missing something but could you tell me how the heat is going to travel through the vacuum  (vacuum = no air, nothing = vacuum) with or without the lid?

You must have done or discovered how a vacuum insulates.  Haven't you?