“I use the aluminium baking tray for something untraditional, I place the tray upside down on the top of my “furniture dolly” (the ones you get at Bunnings with four wheels), which I use to put heavily pot plants on, so I can move them around and clean the pavers or decks underneath. I do this because the “Dolly.”, is only made of MDF or plywood and when I water the plants, the base swells , so they don’t last very long , however with the tray placed over the top , the “dolly” makes them-waterproof.”