Let me talk about collapsible crates for a moment.
I have two of these in the trunk of my car at all times, and they’re fucking great. You can use them to keep your groceries upright, or other things you don’t want to fall over. And if you need the space, just flatten them out. I’ve had mine for years, and I always recommend buying two for your car trunk.
Lots of people out there have products and purchases that they not only swear by, but have been well worth the investment, and I have plenty more to share other than collapsible crates.