A Gridfinity 3×3 base tray with side handles attached using screws. You can use it on its own or stack it on top of other stackable bins with a ½-unit offset.

I use these to stack double-height 8U bins in the deeper drawers of my IKEA Alex units.

Hardware required:

• 4× M3 countersunk screws (at least 16 mm long)
• 4× M3 nuts (nyloc recommended)
• Optional: 6×2 mm neodymium magnets