What else can you make out of book board and paper? Why not some trays? They’re pretty much just the bottoms of boxes and then every item in your house can have a receptacle.
The green one is a tray to hold hand lotion on the nightstand and the red one is to hold my wallet and keys. For the red one, I copied the dimensions and doubled base from the large valet tray on the Parvum Opus website, which made figuring out the measurements really easy.
The double-thick base is a nice touch and makes the tray feel pleasingly hefty, even if it eats up the book board. It’s about time to order more (and replace that red marble paper that I finally used up).