藝伎塞紅寶石中號

The rolling ball inside really multiplies the sensation during movement, and the crystal base adds a nice visual touch. It's surprisingly comfortable to wear for extended sessions, though you definitely feel every step you take.

The crystal on the base makes it feel less like a toy and more like something I'd actually leave out. The rolling ball inside adds a subtle shifting pressure that's different from my old plain plug. Took a minute to get the angle right, but once it settled in it was worth it.

The little ball inside actually moves when I do, and that shifting weight is way more interesting than my old plain plug. The ruby crystal on the base is a nice touch too, looks good on the shelf. Cleaning takes a bit longer because of the inner mechanism, but worth it.