I place high demands on a thermos flask.
I wanted both the 0.7 liters, but of course a bottle where the coffee remained warm for a long time and also tasty.
Had a great bottle of Shira brand, bought once on recommendation from Hiking and Outdoor sites, where users obviously wanted a good bottle in extreme cold temperatures.
But unfortunately... Shira doesn't make these bottles anymore, really nowhere to be found! So looked for a replacement.
Then bought a Primus bottle ... what a drama bottle! After an hour and a half it is no longer chewy and lukewarm.
Read reviews about this bottle, and thought...will be lukewarm again after an hour and a half, but no...
Just a good bottle, preheat the bottle with piping hot water, and coffee stays warm and tasty for around 3.5 hours.
Coffee stays hot and at the right temperature for longer, but then I don't like the coffee as much anymore. So also ideal for tea drinkers!
I really had my doubts, but if it ever breaks again, or becomes less, I will really buy this bottle again.