Vintage round metal pin cushion or small notions box. I think it's made of tin. The cushion top comes off and there is storage for pins, buttons or what ever you want to put in it. Under the lid there is also a mirror.
It measures 1 1/2" tall x 2 1/2" across. It has a cardboard bottom that is stamped Made in Japan.
It's in fair, used condition. A nice vintage collector piece.