Just a lovely Japanese porcelain sake cup, with a great shape and wonderful hand-painted undulating striped decoration all the way around. I am not sure how old, but it feels special, and is marked on the bottom. I'd drink tea ,or really anything, from this, or it would also be terrific on the windowsill planted with a succulent.
3 1/4" tall x 2 3/8" in diameter. Excellent condition.