You can print a lid from: https://thangs.com/designer/bigbrisco/3d-model/%23Gridfinity%20Parametric%20Lids-62072
or a stackable lid from: https://thangs.com/designer/PotatoCheese/3d-model/Gridfinity%20Lids-294307
Bins were created with the Fusion 360 Gridfinity Generator: https://github.com/Le0Michine/FusionGridfinityGenerator
The author marked this model as their own original creation.