Fa rule FA Cup, 13.b.iv states the following
Glasses, glass bottles, or cans containing alcohol are not permitted outside of the
Clubhouse and must not be brought into grounds. No alcohol is to be consumed in
the ground or premises during the period of any match, except as may be governed
by the terms of the club licence with regard to its own members, but, notwithstanding
such, no alcohol is to be taken or consumed outside the licensed clubhouse or any
other authorised area during such match period or brought into the ground.