Get your printer to hit the gym with this 3D Printable Dummbell Filament Spool.
This filament spool works across all printers and is a really neat way of customizing and creating a less boring spool.
Either take an existing refill or just transfer filament from an existing roll.
Just import the STL to your slicer. This is an easy item to print so no issues should be apparent.
Material Cost: ~ 250 GramsPrint Time: ~ 7 Hours
Please note: This item was printed on a Bambu Labs X1C. The results mentioned above are subject to my own personal settings and environment. Your results will vary.