This cup is almost too good. I got it for my office to use with my kereg. The first time I used it, I brewed my coffee, added my creamer and put on the lid. A few minutes later I went to take my first sip and burnt my mouth so bad. So it keeps it scalding hot for a while. I now know to either leave the lid off for the first 5 minutes to allow it to cool a little or wait much longer before I drink. But I did notice how even an hour after brewing, the coffee was still warm in the cup so I no longe...