I believe that the pot with additional "rubber band securing" reisetaugich is (going to a small rubber holder in the upper taper mount).
The pitcher certainly looks stylish and is nowhere hot outside.
Am satisfied.
Addendum:
Have now found that the metal handle is considerably warm from the charged water / tea, etc., can be grabbed well, that's not the problem, but that of course leads to more rapid cooling, that should not be. This is initially not noticed in my Isolierversuch.