So, what can you bring into the stadium? Clear plastic bags, of course! You can also bring in small clutch bags (about the size of a hand) and one-gallon ziplock bags. But, sorry to say, fanny packs and backpacks are a no-go.
Now, you might be thinking, "But what about my phone charger and snacks? Can I still bring those?" The answer is yes! You can still bring in all your essentials, just make sure they're in a clear bag or a small clutch. Easy peasy!