Rubbermaid Easy Find Lids 24-Piece Food Storage Set for $10.00.  Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order for free shipping.  Here is a screenshot for your reference.  The container set Includes two of each: 1/2, 1-1/4, 2, 3, 5, and 7-cup square bases with matching lids.