Wertig, but after some use it whistles each afterwards

I had bought the Alfi jug, because I had no desire to inferior cans that no longer keep warm after a short time - I also found the dishwasher resistance very beneficial. Had I made the assessment immediately after receipt of the pot, I would have awarded four stars. It is very high quality haptic and beautiful. One disadvantage I could see directly is that the lid and 120 degrees can be opened, so always "guaranteed" a shaky position while setting in the dishwasher is. This is my opinion but negligible. Unfortunately, I have to say that after a good year of use the warming function has suffered somewhat (but still tidy), and that after filling now continually whistling occur. As you open the lid at each pouring, the seal uses probably somewhat - although this is only fortuitous and can not be seen. I will buy next time a screw cap, which has a Einschenkfunktion.