The Kati cups are very well made and beautiful. Also, I like that the strainer is really easy to clean. I don't know what kind of black magic they use (shape? material?) but they're really easy to rinse out, unlike my other tea strainers which sometimes require more scrubbing as tea leaves stick to them.
The KATI cup is one of my favorites! Very high quality, beautiful, and easy to use. I use mine daily and have found it easy to clean. I routinely take my cup to work with a single steep bag, its a quick and easy way to pack quality tea and a nice treat during the workday. I recently purchased two more cups for family members.