The TOTEaTOT is our solution to making air travel with small children easier.
Using your own rolling carry-on luggage and your child’s own car seat, the TOTEaTOT connects them with just two strong, durable straps and two tough snaps in just seconds. Included is a built-in storage bag for holding items like diapers, bottles or other essentials.

No more juggling the carry-ons, the car seat, your child and more while racing to your gate. With the TOTEaTOT, you can pull all of this with one hand!

The TOTEaTOT allows you to easily transport your child’s car seat through the airport, so that you may bring it aboard the airplane (recommended by the FAA for your child’s safety and comfort). And there’s no need to rent a costly car seat at your destination.

Link