Do not like the purged filament hanging of the print bed? . . This is one option to contain it.
It will not hang about, but it will still need looking after.
Update 1:
New larger size, which looks a bit better in my opinion.
Update 2:
Alternate clamping method: https://www.printables.com/model/804613-prusaxl-purge-tray-r1
The author marked this model as their own original creation.