Closed bathroom drain cover

My first ever designed 3D model! I tried many CAD CAM programs but Tinkercad did it me. This is a cover for an Australian bathroom drain with bajonet locking so not sure if it has the right dimensions for other countries. Unfortunately our hardware stores don't sell fully closed ones and I really hate the smell of dried up water. The lid has a little round indented circle to allow you to close/open the lid. Enjoy!