Giá đỡ góc phòng tắm với khay xà phòng tự thoát nước

This is a corner mount, self draining shower shelf.  Print using your choice of material. No supports required.

It installs using double sided tape and silicon adhesive or caulk, folowing instructions such as these:

https://www.familyhandyman.com/project/how-to-install-a-corner-shower-shelf/