Aomidi Pak via Amazon offers its Aomidi 6-Piece Packing Cube Set in several colors (Navy pictured) for $22.99. Coupon code "RXIXH4C7" drops that to $16.99. Plus, Prime members receive free shipping. That's $6 off and the lowest price we could find. This set includes a 17.5" x 12.7" x 4" cube, three 13.7" x 9.8" x 3" cubes, and two 14" x 5" x 3" cubes. Deal ends January 31.

Update: The coupon is no longer valid; however, the price has dropped to $16.99.