did not know this! Grazie!Food and Beverage Policy
"Guests are permitted to bring food for individual consumption into Yankee Stadium as long as items are brought in a clear plastic grocery-style bag and are consumed in the general seating area. Outside food may not be brought into Stadium restaurants, suites, lounges or clubs. Food that could be used as a projectile (e.g., apples or oranges) must be sliced or sectioned. Clear factory-sealed plastic water bottles 1 liter in size or smaller are also permitted."
http://www.nycfc.com/matchday/a-zguide/