First, this is 100% tight. In addition, the bottle in my opinion, has to have a double safety system. On the one hand there is a 100% tight screw cap, a drinking Becker is still screwed on the other hand, who would then seal the bottle when the inner closure but would sometimes leak. Thus, there is no guarantee runs in the work bag! The screw cap still also offers a Schnellausschenk function, ie to open a small lever you can give the beverage through an outlet directly into the drinking Becker. But this I do not use, so I can not say anything at the moment. The lever generates the closure at the same time still a vacuum in the bottle, so that the screw cap also guarantees can not be solved by movements!
The bottle keeps my coffee also very good warm.
Even in the afternoon at 14:00 clock the brewed coffee at 07:30 clock is still domestic hot - but not as hot as in the morning. Nevertheless, a very good performance!
Furthermore, the manufacturer promises (not tested!) A fall and fracture warranty and are 5-year warranty.
All in all a smooth 5-star buy recommendation.
