Probably not allowed as it looks like a choking hazard

If they don’t let you in with it, just choke out the security guard.

G1C security treat you like the inheritor to Bin Laden’s will. Don’t push your luck with anything

Now if it was a clear bag I think you would

They letting one of those play so why not as a backpack

They do allow backpacks in the arena, but only it arrives with the Warriors.