I just came off a flight from ORD to LAX with 9 month old on a 757 without a changing table in any of the 4 lavatories. Obviously wasn't going to change the baby in the cabin and ended up putting the changing pad on top of the closed toilet (sounded good in theory). What do parents do on flights long enough to require a diaper change, with infants too young to stand on their own, too long to fit (vertically or horizontally) on top of the closed toilet, on planes without changing tables?