Need to use the restroom? That'll cost you, if Ryanair's new plan to begin charging passengers to use the toilets while flying comes to fruition. Company CEO Michael O'Leary said that customers might have to fork over £1 to "spend a penny" on flights.

O'Leary said Friday, "One thing we have looked at in the past and are looking at again is the possibility of maybe putting a coin slot on the toilet door so that people might actually have to spend a pound to spend a penny in future."

He added, "We are always looking at ways of making air travel cheaper. We are all about finding ways of raising revenue so we can keep lowering air fares."

There's one problem with this plan, however. By charging people to use the bathroom, it could result in fewer drink purchases during flights.