technically ....

before the hammer ....
Test scenario: a room with about 0 ° to 4 °, three Thermioskannen: the Thermax, a good 15-year-old Emsa "Admiral", as well as a recently acquired Primus Thermos in black and sleek design ...
Measurement with a digital multimeter with temperature sensor ...

Ca 17:50 each filled with freshly boiled water without preheating ... advantage of Thermax: the greater to 200 ml volume, a cup more - exactly to my taste !!!

On the same day at:
22:45: Thermax 88 °, 85 ° Emsa Admiral, Primus 85 °

one day later:
21:45 :: Thermax 56 °, 47 ° Emsa Admiral, Primus 44 ° - the first significant differences ...

two days later:
16:45: Thermax 42 °, 33 ° Emsa Admiral, Primus 27 °

10 ° more or less is a lot, especially me - I've occasionally even at 0 ° to do well all day "out" - much ...
Even the difference between EMSA and the Primus fall since even on (surprise myself !!!!)

The Thermax makes first a solid impression, is hammertone painted blue, and was 10uro cheaper because Amazon Warehouse deal ... but in absolutely perfect condition ... The style is "old school", a bit like 50s, 60s: chrome and lacquer, a la Straßenkreuzer - I like is, "touch" something for ....
The plug is screwed, so nothing "click clack" in and out and just splash ...
- One complete revolution untwist, and the tea really flows ...
Feeling never hurts when threads, whosoever fails to tighten with the pliers, certainly has no problems ...

In addition to the rubber rings (the lifting eyes in it are ultimately one is scored on the body metal tab) is the jug provided under the stand with rubber, so first stable, and not crunches when parking, also gets no dents down a steep - also good for a secure footing. ...
I hope that the Gummniteile do not dissolve, such as rubber which sometimes does because Alteung ...

The only "but" is the cup because it is relatively low and therefore probably not so easy to clean ... and I suppose that is boisterous get the stainless steel surface in the course of time - but that do not matter as long as the insulation keeps !

So if a "real" thermos - a holding really warm! - Needs - isse here!