I don't use packing cubes when I travel but I know lots of people who swear by them. There are many companies that sell them. Eagle Creek has their Pack-it Cube, Magellan sells their Stow-Aways Mesh Cubes, Rick Steves and Athalon also have packing cubes that they market, just to name a few. The cubes help organize what is to be packed and they usually have a mesh side that makes it easy to identify the contents. I prefer to use freezer and or air/vac bags like those made by Pack-Mate. You can see everything, they manage wet clothing better then a mesh cube and the price is right!
