rotary handle not disturb Hands on Door Handles Competition

designer's own words:

With materials such as aluminum, acrylic and wood, we shape a design that promotes privacy and the use of knob hangs.

A door with a single handle that gives visibility to turn a knob hangs, leaving the plate to secure interior and allowing just apply pressure.
You can use several reasons knob hangs as rotating lid has an acrylic sheet to hold it.