What supplies do you need to prepare for and use self-storage? Boxes, bins, and bubble wrap are obvious choices. But these aren't the only materials storage requires. Take a look at the lesser-known supplies you need to make the most out of your rental unit. Wire or Stainless Steel Shelves While plastic bins, sturdy cardboard boxes, furniture, and over-sized items can sit on the floor, smaller containers and lighter or fragile belongings may need shelving.