Airtight food container filament holder, using push fit connectors to top of printer.
I found a "Lock & Lock "handy" Rect. 12ltr Incl. Freshness Tray" on Amazon, about £17. A 200mm filament reel just fits in across the short dimension, it fits 3 70mm wide reels easy, if they were 60mm could probably fit 4. Printed a top for the Flashforge print head to hold 5mm push fit connectors for 4mm x 2mm Teflon tubing and mounts for the push fits on the top of the box. Also blanked off push fits to keep unused tubes sealed. I have the reels running on my adjustable reel rollers but it did work just spinning on the base of the box. Also have some bags of desiccant to keep things dry.