If you're a regular flyer who enjoys the odd mid-flight cup of coffee, we have bad news for you.
It turns out that drinking a cup of coffee while travelling on an airplane isn't always the most hygienic thing to do.
One anonymous flight attendant who works for a 'major' American airline, told Vice that sometimes things on planes aren't as clean as you would like them to be.
She said: "Don’t drink the coffee on airplanes."
"It’s the same potable (drinkable) water that goes through the bathroom system."
"We recently had a test for E. coli in our water and it didn’t pass, and then maintenance came on and hit a couple buttons and it passed."
She added: "So, avoid any hot water or tea. Bottled and ice is fine, of course."
It's safe to say we'll be sticking to a can of 7up or a bottle of water next time we're flying abroad.