I take a 2 hour commute to school every day. My Stanley thermos, which was gifted to me by my very consumerist aunt, doesn't keep my moka pot coffee hot for 2 hours.

Although it is a pretty good thermos it seems to be leaking a lot of heat from the metal section near the cap.

Is there any thermos that has every section of it isolated? Like, I shouldn't even be able to tell if there is a hot liquid inside