Good lighting
In the bathroom with narrow space, the glass door can transmit light during the day, which makes up for the lack of lighting. Even if there is no window in the bathroom, it can remain bright.
Warning function
The glass door has a warning function to avoid the situation that there are people inside and people outside don't know. For families with old people, children or mental disorders, putting glass in the bathroom is also beneficial to safety.
Privacy protection
When the lights are on inside, people outside can vaguely see the swaying figure inside, which may not be elegant on some occasions. But as long as the door is locked to avoid being disturbed, using a physical door is also a good choice.