It's called Tsutsu-gata  in Japanese, a cylindrical tea cup or if you like a simple glass.

Enjoy the Japan style in your house!

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Black stoneware tea mug with white glaze inside and just a brush outside .

8cm ⌀ x 9cm h

Every ceramic piece is handmade and dimensions may vary slightly. The glazing effect on each piece is unique and the images are for reference only.