Britney Spears managed to get through airport security at Los Angeles International Airport (LAX) while sipping from a large Mountain Dew cup. Liquids are usually only allowed in small quantities for security purposes, but it looks like Britney got special treatment. Airport Security Rules state that passengers are allowed to carry travel sized (3 ounces or less) containers of liquid in a see-through container, or a 3.4 ounce bottle of water, if it’s purchased at the airport after clearing airport security. However, a security specialist from the U.S. Department of Transportation Security Administration told TMZ.com that screeners have “discretion” when it comes to letting liquids through security. In other words, if you’re a celebrity, the rules don’t apply.