Hatchbox Filament Spool Holder. Fits perfectly and no supports needed and only one piece.
Hatchbox PLA or ABS
Good quality is preferred, but it does not really matter that much. I printed it with a brim, but you don't actually have to and it prints on any filament but because the design is for Hatchbox filament so it makes sense to use Hatchbox filament.
I needed something to hold my extra Hatchbox filament spools so I designed this.