I frequently use Polyterra or BBL spools and struggled to find a sufficiently large cheap Dry Box Kit.

However, this kit provides a solution, accommodating spools up to 68mm in width (Polyterra, BBL, etc.) while utilizing a standard 3.7l. food container.Additionally, the silica housing is designed to hold 20ml bags comfortably.

The design is inspired by various online models but has been custom-made to maximize the width of the spool holders.

Lastly, the upper door features a convenient filament guide, which can be easily installed by drilling a 15mm hole, offering the option to connect a PTFE tube via a 10mm connector.

Please note that the filament guide is not my own design, but you can find it at this link: https://makerworld.com/en/models/39426#profileId-38638

Links:

Box 3,7l NEW LINK 6x CHEAPER: https://amzn.eu/d/012mmw5l

Box 3,7l 4x OLD LINK: https://amzn.eu/d/hg0LLU9 

Bearings: https://amzn.eu/d/7d1HdQ4

Ptfe tube & connectors: https://amzn.eu/d/5H3oCzM I reccomend this PTFE, i had no issue printing TPU as well.

EDIT: V2 fits 68mm spools and the new design does not allow them to ride over the grooves and come out of the rollers