Getting up early for an early morning flight has its perks and drawbacks. You’ll want to arrive at the airport at least an hour before your flight’s scheduled departure time. Avoid bringing anything that will be seized by the TSA agents when you board a plane When it comes to ordering tea or coffee on a plane, most of us probably don’t think twice about it. However, we’re here to tell you something. Avoiding these two drinks is a no-no for even the flight attendants!!!

So, in general, it’s fine, if not great, to drink coffee or tea. However, the plane’s supply of tea and coffee is limited when you order them while flying. The water used to brew both coffee and tea is not from a bottle. No, it’s being sucked out of a hose instead! The water from the coffee hose isn’t what I’m looking for. This information was provided to Business Insider by a flight attendant who felt comfortable sharing it with our team.

Bacteria and dangerous chemicals are also present in airplanes’ water supplies. As many as one out of every eight commercial planes fails to meet basic water safety requirements. Cedric Spak, M.D., a specialist in infectious diseases at Baylor University Medical Center, is well-suited to offer his perspective on this issue.

He is warning anyone who has a compromised immune system to take the proper steps. Steer clear of these beverages at all costs. Parents who are looking to provide a drink of water for their children should never fill their bottles with water from an airplane. They could be placing their children at risk, without even knowing it.

The moral of this story is a very simple one: do not drink any tea, coffee, or water when you are riding on an airplane. Bottled water is fine, though. If you get thirsty, do not drink anything that does not come sealed. Canned beverages are also acceptable if you are looking to quench your thirst. Protecting your health while flying is of the utmost importance. Be sure to share this valuable tip with your friends and loved ones.