I have something like the link I'll post below: Folds down if not in use and good for items that might want to roll around or fall over.
https://www.amazon.com/MaidMAX-Organizer-Handles-Pockets-Foldable/dp/B01GNW43S8/ref=sr_1_4?crid=2KH86WNWLI8UT&keywords=car+trunk+holder&qid=1688012708&sprefix=car+trunk+holde%2Caps%2C164&sr=8-4