Full / Empty Flag for Trash Can / Recycle Bin / Waste Bin

This model fits on the center of the handle and straddles the septum.  There is no glue required; however, organic supports are necessary during printing.  Printing the part as shown with PETG will allow the part to flex and fit around the handle without breaking.  Set the vertical wall perimeter to 10 to make sure the part will be filled in a direction to support the flexing.  The FreeCAD parametric model is included if there is need to change the flag length or handle diameter (33mm default).

After putting the trash can on the curb, flip the flag up.  When the can is emptied, the flag will fall down.  

If your bin does not have a septum or you do not want to use supports, another universal flag is available here https://www.printables.com/model/771018-universal-full-empty-flag-for-trash-can-recycle-bi