You mention thickness and density, but what about shape? Would you go for something shorter and wider (say, a half-moon) to accommodate the flat leaves, or something taller, or would you stick with basically spherical? For my own purposes, I’d be interested in something on the small side, to make tea for just myself or myself and a friend, presumably less than 100ml. But I’m sure others would be interested to hear more of your experience with various shapes. And thanks, Leo, for all the information you do have on the site!