My last trip was to southern Spain. They have incredible water there! The apartment I rented was already stocked with a pretty nice electric kettle.
I limited myself to two teas - med. TGY and a cliff tea (don't remember which specifically.)
Packed some cups, a pitcher, and a decent Yixing that I got very cheaply in Chinatown (yeah, it happens sometimes.)
One or two of the cups got broken along the way, next time I will pack much thicker ones.
But, I am planning my next trip to be in Hong Kong and/or Taiwan. There doesn't seem much reason to carry tea there
Probably even easier to pick up a very cheap gaiwan set if I really need to use it there, then to risk carrying one.