Here is a box with a shutter lid. The lid conveniently slides away into the box itself, hence not having the box and lid separated; no lost lid!

This is my 3D design of the box for 3D printing. The design comes in 3 pieces, the base, a side wall and the sliding shutter. Internal box dimensions: 100 x 60 x 37.5mm. The parts are held together by two countersunk 6G (3.5mm) x 15mm self tapping screws.

My print is made in PRUSA PLA 1.75mm Silver and 3DFillies PLA+ Silk White filaments, with 0.2mm layer height and 100% infill on a PRUSA I3 MK3S printer. No supports are required.

I hope you can find this print useful, too.