I am making a DIY passive filament storage dry box.  Once I sealed the lid with foam insulation strips and sealed it closed, the lid warped slightly allowing a minor air gap to form.  I designed these clips in Tinkercad to keep the lid closed all the way around.

Printer: Creality Ender 2 Pro

Filament: PLA (Sunlu Grass Green)

Infill: 100%

Brim/Skirt: Not needed

Supports: No