The inside white waves are stitched by hand, using traditional Japanese patterns and technique. Thank you maman!
You can see the stitches better here:
On the cloth, you probably will have noticed a small (6-8 cl) Zhuni Jun De teapot. (I guess you don't see anything else by now!). It has some defects: you can see a damage at the rim of the lid. Still, it looks very well balanced. Another very classic, round shape.