Ultralight Filament Drybox Storage System (245g)

Ultralight Filament Drybox System

Keeping filament dry and protected from UV damage shouldn’t require bulky containers or expensive storage systems.

This ultralight modular drybox stores filament securely with a desiccant spool installed while using only 245g of filament per container.

The design is optimized for dense shelving and print farms, allowing large filament collections to be stored in a compact and organized way.

This project has been six months in development, and it was finally time to stop refining and put it out in the world.

I plan to update this listing with additional documentation and possibly a video walkthrough in the future.

If you print one, I’d love to see your setup — feel free to post a make!

Features

• Ultralight design — only 245g of filament (that's four canisters per 1kg spool)
• Stackable modular system providing scalable storage for large filament collections
• Compatible with standard 1kg spools
• Allows a desiccant spool to stay installed during storage for superior moisture control

• Internal crenellations allow air circulation when sealed — desiccant can only control moisture when the air can reach it
• Threaded lid for an excellent seal, with a channel for optional 3mm weather stripping (ideal for high humidity climates)
• Integrated front swatch slot for filament identification, ideal for 40×30mm thermal labels
• Ergonomic lid removal tool for stuck lids

• Optional bench mount holder for users with limited hand strength or mobility

Compatibility

Tested with common spool formats including:

• Bambu Lab
• Creality
• Polymaker
• Elegoo
• Sunlu

…and many other standard 1kg spools (~200mm diameter).

Usage

Add silica gel packets* or a desiccant spool holder (This is the spool we use) 

Print a swatch and attach a 40×30mm thermal label

Install a 3mm round weather stripping gasket in the lid for high-humidity environments (The mini spool we use to store it)

*You can also recycle and recharge the silica gel packets that come with filament. We do this for many of our less-used filaments to save money and reduce waste.

Included Files

• Canister
• Lid
• Filament swatch insert (setup for 40×30mm labels)
• Lid removal tool (requires two M3×12mm countersunk screws)
• Optional bench mount canister holder (requires two #4 wood screws or similar)

All parts are arranged for efficient printing and minimal material use.

Printing

Recommended settings:

• 0.4mm nozzle
• 0.2mm layer height
• 3–4 walls
• 15–20% infill