[fhars]

There are even commercially available prototypes of that vacuum cooling technology, if you want to perform your own experiments with that concept: https://www.amazon.com/Thermos-Stainless-Ounce-Drink-Bottle/...

[sanex]

That's my water bottle. 10/10 would recommend for not passing temperature gradients.

[ahartmetz]

To be fair, they have mirror surfaces inside. A more realistic prototype would be ultra-black for something like 10-50x better radiative heat transfer. Of course it would still be more like shitty insulation than like good conduction.

[RugnirViking]

this kind of sarcasm will go over their head. People truly don't understand vacuums

[ReptileMan]

I absolutely don't understand how vacuum works. So I absolutely cannot model how a Dewar flask which has 15 billion light year thickness between the inner and outer wall - a wall that is very close to absolute zero will behave.