My SUV is great, the third row seat gives me plenty of room for my kids and their friends but it makes for a short trunk area. That leaves two options when I have a load of groceries; either fold down the third row seat, or stack the groceries in the back. Here's the problem, if I fold down the third row it leaves a cavernous space and my groceries (or sports items on the weekend) roll around and get smashed plus I have to crawl around back there to gather the groceries when I get home to unload. If I stack the groceries instead, invariably my bread/fruit/eggs/chips get squashed and when I open the lift gate at home the items stacked on top fall out to the ground.
What I really needed was a two shelf system to give me some help separating delicate groceries or keeping muddy cleats away from everything else. But, it had to stow away flat when I need to haul bigger, bulkier items.
My solution is a Pop-up Shelf. It saves me money by not having to replace grocery items, effort by not having to clean mud off of our sports items, and frustration by giving me easy access to everything without digging through a pile of stuff to find what I need. I also feel more secure about hiding shopping bags or purses out of sight when I need to leave them in the car. Want to build your own? Check out this Instructable you're on your way.