Medium (13.1 x 10.2 Inch) Cabinet Storage Shelf Rack, Shelves，Kitchen Counter and Cabinet Shelf, Storage Rack Organizer for Kitchen, Fridge, Cabinet, Bathroom Cupboard& Pantry (2, White)

I have these storage racks in a lot of my upper cabinets. They come in a variety of sizes and are nice and sturdy. They allow you to effectively divide the space and avoid stacking items.