I bought my husband this coffee mug for the way to work. Should at least be keep warm and 2h easy to clean. The cup is fully consistent with our expectations. Lasts approximately 3-4 hours warm and super clean (when unscrewing the entire top cover and not only the inner part - as can be read in the review of Nitram). Even the cover itself can still take apart, to thoroughly clean it. All in all, a successful Thermobecher !!!