Hi,
there exist a simple cheap issue to your problem.
You go to Auto-5 and buy a antisliding mat which is
sold on roller of one meter (for car trunk) and easily
cut.
You can cut the piece you want and put it in the
glove box, as it's black it's invisible and really
efficient (I've put some pieces in my "every day
business car" and it works well, every item stay on
place when braking hard or cornering speedly).
Best regards.