Lidded gridfinity bins with a click-in-place sliding stackable lid. For storing very small parts you don't want spilling out. 

The lids have a notch that click-fits into place so a finger can easily slide a lid off, but gravity can't.

Inspired by Gridfinity Extended's sliding lids. I didn't like how easily they slid out, and how lidded boxes could not effectively have additional parts stacked on top of them. 

For the 1x1x3 size, I highly recommend the 4mm magnet variant, as the reduced magnet strength makes the box easier to handle. 

1x1x3 boxes are very slightly crimped at the top to allow for printing multiple copies by-model with an Ender 3 printer.