I‘m selling some of my ceramic online and the odd box and cardboard from the supermarket make for excellent free lightweight plastic-free reused material to keep things from moving inside boxes. Egg and strawberry cartons are good too. I just wanted to share the idea.
Cartons from Rewe stacked on each other on a the black stove top. They are cartons in which were bottles of Cornichons, red paprika, etc on the shelves in the supermarket.