When the cardboard tray my wife used to use when purchasing cat food at the pet store wore out, she asked if I could make something that was a bit more sturdy, maybe something stackable. These will hold 18 3-oz (85g) cans securely for transport in the store and car.
Prints fine in PLA or PETG, no supports necessary.
.2mm layers, .4mm nozzle, nothing special required. I print with 10% fill which makes for a pretty sturdy tray.
The author hasn't provided the model origin yet.