In an 
effort to cut costs, airlines have eliminated food service from many flights and encourage passengers to bring their own food on board if they need a snack.
This is a great idea. However, when selecting food to bring with you, please avoid foods with strong or foul odors. Airplane cabins are tight quarters and other passengers do not want to smell your onions, garlic, or muenster cheese. Be courteous to passengers and flight attendants who have to endure your company for the duration of the flight.