Set of 6 Neaterize Heavy Duty Stackable Fabric-Covered Storage Boxes with Dual Handles for $34.99.   You get three different sizes; small/medium/large, two of each size: 8.5 x 12 x 6.5″ – 10 x 14.5 x 8″ – 12 x 16 x 10″.  Order 2 or more 6-packs and get Free Shipping.  These seem to be a lot sturdier than the Dollar Tree ones, which admittedly are pretty flimsy.