Because airlines keep on thinking up new ways to get us to part with a few more dollars, Frontier Airlines is now encouraging passengers to tip their flight attendants. Frontier actually made tipping an option three years ago, but flight attendants had to pool the tips. Now the policy has changed as of January 1st so they can accept individual tips. Passengers who order refreshments get a prompt from the airline's payment system that they have the option to leave a tip, with the message, "Gratuities are appreciated!" The Association of Flight Attendants International union, which represents 50,000 flight attendants at 20 airlines, including Frontier, opposes the tipping policy, saying the flight attendants should instead be paid higher wages and those costs not shifted to passengers. No other U.S. airline gives passengers the ability to tip flight attendants.