Iwami yaki Suribachi. Hand-worked jagged grooves inside the bowl grinds ingredients into a fine paste or powder. Non-slip silicone rubber on the bottom stabilizes bowl. Also protects table from scratches while grinding.
Hot water, microwave, boiling water sterilization, dish washer is okay.
Avoid oven, and direct flame
Select from two sizes:
Small: D6'' H3.75''
Large: D7.25'' H4''
Made in Japan
Note: Pestle (suribou) is sold separately.