if they had a lid for the h200 i would pick up one as a cortado/cappucino to go cup. I have the 450 and love everything but the fact it doesn't fit in a cupholder.
FYI even if the titanium doesn't impart flavor mine eventually ended up brown from coffee stains on the inside and that was affecting flavor. used a mr clean magic eraser (melamine foam) and it's back to new.
jaybopThese do keep hot beverages hotter longer than a ceramic mug, but as you also noted, don't expect hours from it as these are not vacuum insulated like Yeti etc., but just double walled. The outside does get warm to touch (not hot, just warm), meaning they do lose heat. Still most of the heat is lost through the open top, so if you can find a lid, it easily doubles the time.