You already know to give a kid a bottle or pacifier to suck on during takeoff and landing, right? [Actually, after the kid had a near-meltdown before we even left the ground, one flight attendant told me they start pressurizing the cabin as soon as the door closes, and it's good to get a baby drinking/swallowing/sucking right away to ease their ear pressure. But I digress.]
So we're descending into Chicago, and we've started the bottle too early; the kid's going to finish way before we actually touch down.
But since we have those Playtex Ventaire bottles, I just unscrewed the end and poured some more water in and resealed it. It's no MacGyver or anything, but it worked out well. No fuss and no interruptions.
You forgot to add breast to the list of things to suck on :)