I use the Alfi "Hotello".David R. wrote:If you happen to have a photo of this carafe Stentor...

I think they have even better models, to be honest.
Mine is 0.6 l. It is all stainless steel (no rubber or plastic). This one does not close super tight because there is no seal. Instead the stainless steel lid just sits on top and can be lifted by pressing the thumb button (the lid would open if you turned the carafe upside down). (This is because it is meant for quick serving of hot coffee for breakfast in hotels...)
I think that it might be even better if it had a rubber seal but I am not sure.
Nevertheless, it keeps water hot for a long time. However, the less water there is in there, the faster the temperature cools down. Still, I can easily have hot enough (80° C) for my 4th infusion of sencha in an hour / hour and a half long sencha session, which is the norm for me.
If you want to get one, I would probably recommend a 1 l model with a tight seal.
I've been using this for a year and have found it to be a convenient solution for me when I drink green tea.