Airplane Instrument Coasters!
Only $13 for a set of four at Trintec. They feature airspeed, altitude, and compass.
[via Future Gringo]
[Will someone please buy a set for The Cranky Flier, voted by Internet readers as the best travel blog?]
Note:This story was accurate when it was published. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.