Hmm, yes, I can see a product idea here: Klein bottle waste baskets.

When your waste basket is nonorientable, life becomes much simpler. Everything is both inside and outside the trash.

He he, good one. That reminds me of a joke I once made, in some relevant context, referencing Heisenberg and Pauli, but I'm uncertain what it was now, so I'll exclude it from here.

https://en.wikipedia.org/wiki/Wolfgang_Pauli

https://en.wikipedia.org/wiki/Werner_Heisenberg

For anyone missing the joke, his follow-up book attempting to better convey some of the same ideas is called "I Am a Strange Loop".

Nope. Strange loops are not by definition not intentionally circular (while a circular graph in a file system is in this case). He makes that clear I think in the final chapter of GEB.