Foaming laundry soap with brush, soap case, white, Utamaro

Product Name:
Size: 7.2x12.2x6.7

[Product Description]
This Foaming Laundry Soap Case allows you to lather soap by rubbing it against the bottom of the case, so you can wash clothes and other items while they are still in the case. The lid has a spring, so even small pieces of soap can be used up without waste, making it economical! The brush also rotates, making it easy to scrub.

I used it about five times, but there are a few spots where the base of the brush has turned brown.
The brush part is slightly discolored brown, but it did not come off even when soaked in bleach.

I purchased this on Rakuten for 1,888 yen.