Small parts storage

My preferred system for storing lots of small parts (screws, Legos) in my workshop or studio is a multi-bin case. Many brands (Sortimo, Stanley, Amazon) made these at different price points but the form is similar. The clear lid of the flat case opens to a grid of different sized bins, which can be moved around to suit the contents. The cheapest ones, good enough for me, are 20-bin Storage Cases from Harbor Freight for $9. I have 20 of these trays stacked in a rack. — KK