Lazy Susan’s, had been around for YEARS! They’ve been used on table tops, in nook cabinets, and as mini spice holders.
NOW, they’re getting used, as a fridge organizer! You can purchase those, however why spend all that extra money, when you’ll be able to DIY it your self?
You can use metal plates, however I’d opt for something plastic, because the condensation in the refrigerator, may cause rusting. The Plastic air-soft BB’s are reasonably priced, and will work nice!