What items are prohibited at AT&T Park?

There are several prohibited items and the rules are strictly enforced. You are not allowed to bring glass bottles and cans into the ballpark. Alcoholic beverages of any kind, including wine and non-alcoholic beer, are not permitted, either. You may not bring a weapon with you into AT&T Park. And while banners and signs are welcome at the ballpark, they cannot be higher than three feet.