Very helpfulAmazon.
Search: "trunk storage bins"
Hard to believe snap on has anything for 35 buckshttps://www.walmart.com/ip/Snap-On-870116-21-Inch-Car-Trunk-Tool-Carrier/22125805
not that I would buy from walmart... but I can't find it posted elsewhere for the same 35$ I paid.
pretty legit for a little trunk organization. it can only hold a few grocery bags if that's what you have in mind. I tote around misc. detailing supplies and dog stuff and leave an open pocket for a grocery bag. it has velcro on the bottom to help grip and doesn't move around.