This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/gn6rjUyQ6Lh

Here's a yarn bag divider designed by my wife, It sits inside a bag and keeps the two balls of yarn she's using separated so they don't tangle as she knits with them both at the same time,

I made it disassemble so it stores more compact holding it together with the pin.

Update:

1. added a shorter version for shorter bags 4-20-2019

If you have any questions or suggestions, please let me know.
Thank you for looking. Enjoy!