The thermal container is quite ok, but not 100% sure ... after 6 hours of content is höhstens only lukewarm, if at all. Up to 4 hours it is ok if you filled the tank before at least 30 minutes with hot water and "preheating". Then the content is also good warm. I kept the container, because I find the Presi-money ok, and my "up to 4" -hour enough.