I use these. They fold when not in use and get the job done.
https://www.oemvehicleparts.com/oem-parts/mercedes-benz-collapsible-shopping-crate-66470995?origin=pla&gclid=Cj0KEQjw0IvIBRDF0Yzq4qGE4IwBEiQATMQlMRs_2oSg9viLxDCsmXBx0rkOrp_1SAz33lqMXxT3Sa0aAqn68P8HAQ
