I had the Travel Mug 2, same exact experience, with the added benefit of it turning on all by itself overnight while it was empty, and then hitting some sort of

I had the Travel Mug 2, same exact experience, with the added benefit of it turning on all by itself overnight while it was empty, and then hitting some sort of temperature limit and refusing to work without a factory reset. The factory reset itself was also buggy, and it would sometimes take 5+ attempts to get it to actually reset. Hot garbage, which is a shame because the idea is good. Nowadays I just use a good thermos, and pour my hot drink into a standard cup when I want a refill. Problem solved, zero electronics required.