When it comes to healthy ways to stay hydrated, tea is near the top of the list. Not only is it fat, calorie, and sugar-free, it's also often loaded with antioxidants. So why does Viggo Mortensen keep getting in trouble for his tea habit, especially at the airport?

Probably because Viggo drinks his tea with a pipe. He prefers a tea called Argentinean mate. According to Wikipedia, mate is an infusion of stimulants and tea that are traditionally drunk out of a gourd. Modern drinkers like Viggo, however, may use something called a bomba. This small metal pipe allows the tea to reach the mouth, while filtering out the chunkier parts of the mixture.

The problem for Viggo is that he often takes his tea and bomba to the airport in ziploc bags, causing airport security to raise their eyebrows in curiousity and concern. Once Viggo explains that what he's carrying is tea and not an illegal drug, he says, it's usually not an issue.