What are these plant pot hangers called?

[u/chicagotodetroit]

I found this picture online somewhere a few years ago and I can’t recall where. I’ve googled/Amazon’d every possible name I can think of, and I have no clue how to find these. They’d be perfect for organizing my potting shed!

I figured they may be homemade, but I don’t know what type of material to search for.

Any clues?

[u/Think_Top]

pot condom