This is a label made for the “Filament drybox inlay" system made by Chwiede!
https://www.printables.com/model/1462400-filament-drybox-inlay
The tolerances on my printer makes it a snug fit and not prone to wiggling out when manipulating the storage box.
I use a label maker to put labels on the tag itself, though you can write on them with sharpy if you wish!
The author marked this model as their own original creation.