I’ve been traveling with this exact set for a number of years, and believe you me when I say they are life changing. The set includes one large cube, one medium cube, one small cube, one extra-small cube, a slim cube, and a shoe/laundry bag (it’s good for both – source: me; I have used it for both. Not at the same time, though! Pick one or the other and commit to the decision).
Promising review: “These made packing for two weeks in England in carry-on-only possible! These really helped organize and pack two weeks’ worth of clothing into a carry-on size suitcase. I did do laundry while traveling, but these helped to compact what I packed and keep it organized. I watched a few videos for tips and certain items are best rolled to avoid wrinkling and to fit into these packing cubes in a way that optimizes the compression feature. I definitely recommend. I purchased a few sets so I could use for myself and my kids. It made it so much easier to find things at our destination and keep them organized.” —EMUELLER
Get them from Amazon for $37.99+ (available in 10 colors; also available as a set of three or four).