When you’re older, you will understand good design.
Does it safely hold hot beverages?
Does it have a handle?
2 ticks and it’s job done for me, actually my favourite tea mug doesn’t actually have a handle anymore since my eldest dropped it.
or were you talking about arty farty look nice design* as opposed to actually does stuff design**?
*smiley for binners et al
**if it keeps your brew hotter for longer I may retract my statement but in the (considerably lengthy) bumf on that page it doesn’t mention brew longevity I think I’m safe