There's a bit of irony.
Festo decided on using an end use product (Systainer) as a way of working with the German Packaging Ordinance to help reduce/eliminate waste going to landfills - only to have them come to the USA and end up in a landfill. LOL!
Gotta love irony .
That aside, you should really stick them on CL or FB Marketplace and sell them. They fetch a decent amount of money & sell quick.