Airplane cabins only have so much space for you, your hulking “carry-on” bag and the purse or laptop bag full of “essentials” you simply must have at your fingertips (but that you don’t want taking up legroom space under the seat). Enter the High Altitude Flight Bag by Genius Pack, a bag about the size of a baking pan that holds gadgets and other necessities, but that also straps to the bottom of the tray table. When the tray table is up, the Flight Bag offers easy, eye-level access to your electronics, magazines, books and tablets — and it doesn’t get kicked around under the seat. The pockets are well suited for the items you want while sitting on a long flight, including a roomy main pocket and a front pocket with labeled smaller pockets for chargers, smartphone, external battery and passport, among other things. The idea behind the Flight Bag is good on paper, but in practice, it probably shouldn’t be used by passengers in the middle seat or aisle seat.