I've had a very similar set that I got from Hankook teas
. It was pretty celadon, and seemed very compact, sturdy, and handy, but over time I stopped using it because of 2 problems: the cup was smaller than the brewing vessel, and it was hard to stop pouring water at the right point to match bowl volume, so I'd end up with the tea oversteeping in a little water between infusions--sometimes nice, but sometimes problematic when it's not planned/deliberate. The other problem was that it had very little lip above/away from the hot infusing liquid, and even when I start my infusions of green teas at low temps, I work my way up to higher temps by the end, and I scorched my fingers too often to be comfortable. So it was retired from the collection.