5kg Drybox from a 19L 'Really Useful Box' album storage container. I made supports to help hold the weight (50% infill), put in a hygrometer, filament port, and added a silica desiccant
Amazon.com: A & UTV PRO Tool Storage Box for Can-Am LINQ Ski-doo, 19 L Waterproof Rear Trunk Rack Cargo Box with Lid Accessories, Replace OEM #715004301 : Automotive
6/13/19L Collapsible Plastic Storage Box Multifunctional Portable Toy Cereal Pet Feed Sundries Organizer Folding Container Box - AliExpress