Summary

A hook to take two stacked laundry baskets with a recessed hole for a screw.

The .scad file is all parametric, so it's pretty easy to push and pull around for different sizes. The second photo is a much smaller hook that I printed with some different settings; I'll use double sided tape with it rather than a screw.

update: I've tinkered with the scad file so now it works with the customizer app. It's my first go with this, so any comments are welcome.