Insulation
The cup holds excellent warm. Even hours later the coffee is still hot. I prepare the cup but also well before, as I umspüle him before filling with hot coffee with hot water. Caution here: in the cup a small pressure builds up after the closure of the hot contents. When you first open so some water may flow out. In my opinion, not a defect, but the proof of the cup is how excellent tight.
Cleaning
The screw cap can be disassembled into 2 parts and can therefore be made very good clean. Before assembling the 2 parts of the screw but the parts should be dry. Otherwise water located in the lid runs later out of the lid. That is not the hot coffee pouring, but flushing water from the lid. The assembly of the cover was a bit fiddly. After three weeks, the assembly is no longer a problem.
Incidentally
In the sauna temperatures - Today: 20.06.2013 back to 28 degrees C - the cup is ideal for the transport of cold drinks.
As I said, gladly again.
