Can confirm, walked into a bathroom and witnessed this happening when these were first introduced here ~15 years ago. Nobody believed me but… I know what I saw that day.

The snaps on this are giving me major flashbacks, though I can’t put my finger on anything specific. My mum was a seamstress and I’m sure I remember finding and playing with something exactly like this in her room as a kid back in the 80s. Will reply here if it comes back to me :) the fact it’s adjustable to fixed intervals via the snaps seems too purposeful and practical, though - especially with the metal presumably giving rigidity to whatever it’s used for.