After I was looking for a jug, which 1. keeps warm long, 2. no mess 3. is empty easily, I'm "stuck" on various reports in hiking / trekking forums at the thermos. After a super-fast delivery through Amazon, there was the first test. Afternoon filled hot water at 15:30 clock and the next day at 09:30 clock it was still veeeery warm. Then there was the first short hike and thus the test can. In the backpack was nothing (the twist lock ensures here for the necessary tightness) and the tea was the whole time (5 hours) very warm, not to say hot. He always had something to cool before drinking. Again and again we have held and shaken the can upside down - close !!!
For me, this pot is the right decision, and despite the high price, I think that I have no other need in the coming years.