@babelcarp This is one of those ultrathin bone china ones – I quite like them for traveling, counterintuitively, as they're *extremely* light (far lighter than my titanium one) and stackable with 3 cups inside.

Thankfully I remember I previously broke a lid so I should still have the bowl part to pair this with. And they're cheap (provided one happens to be in Taipei's yingge street..)