I designed a filament box suitable for all 1kg spools. It prints without supports. The boxes are stackable, both upright and on their sides. The top and bottom shells simply slot together, as does the snap closure. The connecting pins for attaching it to other boxes can be glued in place. I printed it with translucent PETG to show the filament color.

Only glue the small connecting pins into the top shell. Glue the large connecting pins only to the left side of the top and bottom shells when the snap closure is facing forward. A TPU gasket is included in the print profile.

Enjoy your new box!