Flight 001 Spacepak Clothes Packing Cube $27.00via Amazon [amazon.com]
Free shipping w/ Prime.
Available from another seller for 26.99.
Cheapest this particular item has been according to the camels - usually in the mid $40s.
For sure, many brands of packing cubes exist at better price points, just sharing this particular one. So far, so good from my personal experience. I've had cheaper ones that rip at seams after one or two uses, these seem to take the abuse much better (have not ripped one yet). I like the 2 sided (dirty/clean) configuration with these.
Good to smush clothes into a suitcase / keep things organized if you're OCD.