What to Use?

[Yamahog]

We just purchased a new (to us) X5 M. I'm used to using cargo nets in the trunks of our vehicles to keep the groceries from rolling out of the bags and all over the place. Cargo nets don't seem to be an option for this vehicle as there aren't any hooks in the rear. (I know it has tie downs.) My question is, what do folks use in the rear of their X5 to keep the groceries in place? My wife will be the primary driver of this car and she loves to grocery shop. Thanks!