Beautiful old white ironstone china soap dish complete with cover and insert, early 1900s vintage Meakin - England.
The lid has crazing and some light browning, though the dish and draining plate insert look good, no chips or cracks.
That's a giant 3" bath fizzy to show scale in the photo - it looks like this would hold a bar of soap about 4 1/2" x 3" x 1" with the cover in place.