After some bullying yesterday I got myself a new ThermalMug300. I threw the packaging away (why would I need that?).
Turns out that I am not quite sure how to drink from it.
It comes apart in three bits and yes, I can remove the top two pieces (as one) and drink like one would from a normal mug or glass. But surely the top part screws apart from the rest of the lid for a reason... so that you can drink from that in a sort of drip but stay hot fashion.
Here are a couple of pictures: