these cubes were great when we went on our recent Disney Trip. I packed the suit cases and put toiletries in the small ones in our checked baggage. My hubby and I each had a large one with a change of clothes and a swimsuit. i put the two large ones in a carry on tote that fit under the seat. When we went through the security checkpoint at the airport it was easy for the inspectors to see into without moving much. It made that experience much easier plus when we got to our Disney Resort, we were able to go into the public restrooms and change into our swimsuits to use the pool before the rest of our luggage arrived and before our room was ready. I love this product.