I keep my large cones in cardboard 6-pack cartons (think beer or soda) in a plastic rolling cart with deep file drawers. I can keep like colors together and pull out a 6-pack when I need that color. Each drawer holds 4 cartons (24 cones). For my smaller spools, I have shallower drawers fitted with pegboard into which I've glued dowels (about 1 1/2 inches long) to slip the spools over. It keeps them standing upright and I store like colors together so I can easily see and find the color I need. I have 2 sets of those drawers. One for embroidery threads (like Isacord), another, shallower set for sewing thread spools.