“It also makes a perfect portable tray for stuff that can’t go through security at the airport. Unload your pockets into the travel tray and then pull the flap over the top and pull the drawstring. Every thing is secure and goes through the X ray to be recovered on the other side. Then you can just pop the whole thing into the pocket of your luggage to reassemble everything when you are safely at your gate.”
See also: the Travel Tray, which is currently on backorder but should ship by the end of this week.