If you are flying for the first time since the summer, do not forget most that liquids are still banned from your carry-on bags.
But if you do forget, and you are at the right airport, there is now a new store for you.
A new program at a few airports, including Chicago O'Hare, allows travelers to mail their banned items to themselves.
Kiosks are set up outside the security checkpoint, and they will pack up and mail your banned items to you for a fee.
The Transportation Security Administration hopes the new program will help passengers who are confused, or forget what is allowed on planes.
There is no word on when or if the program will go nationwide.