Make the most out of your Bambu Lab refill filament spool and don't throw it away!
The Bambu Lab Cardboard Spool Box is the perfect solution to transform your refill filament spool into a practical and reusable box. This box is highly durable and stable. Its lid features a threaded design, allowing it to be easily screwed on and off. Once securely closed, it stays in place and won't unscrew on its own. Additionally, this box is stackable, making it convenient to organize and store multiple boxes.

Assembly is straightforward and requires no glue. Ensure that the edges of your refill cardboard spool are clean and not frayed, as this could cause difficulties during assembly. The process is mostly self-explanatory: take the box base [part 1] and the upper section with the internal threading [part 2], and press them firmly and evenly into the cardboard spool. Avoid using excessive force. Once everything is pressed together cleanly and evenly, the assembly is complete. You can then screw on the lid, and your box is ready to use!

This box has undergone multiple iterations and improvements to achieve the perfect result. If you have any questions, feel free to leave them in the comments.

For the best experience, I recommend using the 'Designer' print profile, as it has been refined and improved over nine times!

• March 26, 2025 UPDATE: The 'No Supports' print profile has been newly added, and as the name suggests, it does not use any supports. To make this possible, overhangs have been slightly rounded off or removed. In this print profile, the box bottom [part 1] is therefore thicker compared to the 'Original' print profile, which makes the available space inside the box slightly smaller. Nevertheless, both print profiles are compatible with each other, meaning the stacking function of both print profiles works seamlessly together. [Images of the 'No Supports' print profile can be found in the model images!]

• April 08, 2025 UPDATE: Introducing the 'Extender' print profile, which enables you to stack multiple Bambu Lab cardboard spools to create larger boxes. The Extender is placed between two cardboard spools. Assembling is straightforward: carefully and evenly insert the cardboard spool into the Extender. Ensure the spool is clean and free of uneven edges. If uneven edges are present, gently trim them with a knife. [Images of the 'Extender' print profile can be found in the model images!]
  Note: The Extender has not been tested for a stacking limit, it is recommended to use only 1 or 2 Extenders per box for optimal stability.

If you like this model, feel free to leave a like or feedback in the comments. Follow to make sure you don't miss any future designs. Boost my models to support me. Thank you very much, I really appreciate all the support!

Happy printing :)