(CBS) In a ballpark first, the Twins debuted a self-serving beer machine in Sunday’s game against the Yankees, and it’s scheduled to be in action for all the baseball world to see when Target Field hosts the All-Star Game on July 15, according to the Minneapolis Star-Tribune.

The Twins believe the self-serving beer machine is a first of its kind in North American pro sports, the Star-Tribune reported.

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So how’s it work? The Star-Tribune has the details, with the most interesting part being that beer can be purchased by the ounce:

A patron goes to a concession cashier, shows proper identification to verify age and buys a vending card with either $10 or $20 on it for use at the station. There will be $50 cards available for the All-Star Game.

There are four beers to choose from, and they can be bought by the ounce: Bud and Bud Light (38 cents per ounce), and Shock Top Lemon Shandy and Goose Island 312 Urban Pale Ale (40 cents per ounce).

Customers can withdraw up to 48 ounces every 15 minutes. If that sounds like a lot, there is an employee at each machine to not only check identification but also to intercede should a patron appear intoxicated.

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Check out the photo below, and prepare yourself for a new ballpark experience if this catches on.

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