That tin cup is a true thing...
I have a 40 gallon travel cup... I measure my pour-over to meet what it will take. It's probably two proper coffee cups worth, in one cup, designed with a fat bottom to stay upright sitting on the floorboards of the truck... Yes, a throwback to when trucks did not have cup-holders and heated seats for princess asses...
But something is lost in that cup. The slosh-marks on the dashboard are gone... and that smell in the defrosters that is only there because of spilled coffee... Even the extra cussing from the spillage during the event - All fondly remembered by a duffer who was around before travel cups, not to mention cup-holders.
And the portion - that tin cup, too hot to handle at first, was always hot to the bottom - Because you STOPPED to drink it, and generally dared not to move till it was at least half gone. So the tendency was to be too hot, and remain hot to the very bottom because the act was mated to the intent, and the portion signified that intent... Added to a tin cup, with no insulation, the whole thing self-governed without any bow to time.
There is something there.