About 3 years ago, I bought the eBags Slim Packing Cubes along with other eBags packing cubes in various sizes. I've found that packing cubes enable me to fit more clothes in my suitcase and the cubes actually help protect the clothes from wrinkles. They're also useful in the car for everyday use and have held up well. I'm a huge fan!!! I've even given them as gifts on many occasions.

The small cubes (such as these Slim Packing Cubes) are great to store snacks for a plane or car ride. For plane rides, I pack granola bars, gum, etc. in a small packing cube and then place it inside my carry on bag. The small cubes are also very useful to store power cords, small electronics, and toiletries. One of the slim packing cubes also works great to store the items I put together for an emergency kit for the car. It includes things such as work gloves, bungee cords, Duct tape, a small first aid kit, and a multi-tool.

I use the larger cubes for clothes. I found it works best to roll my clothes and to put like items in the same cube (e.g. I roll each pair of jeans and then put them all in a large cube).