BOSTON -- A new device is helping baseball fans sneak beer into the ball park and avoid long lines and high prices.

It's being called "Bring Your Own Beer Belly."

It's a pouch you can fill with beer and hide under your shirt. You can pour up to six cans of beer in it.

The pouch goes in a sling, which goes over your head and gets velcroed on around your body.

During the game, fans can drink from a hose that sticks through the shirt collar or sleeve.

A California guy dreamed up the idea. The beer bellies are sold online for $35.

A warning: police say using it could violate open-container laws.

Some say the new product could redefine the term "six-pack."