I rather like my FIZZY drink ... well ..... FIZZY ... and I drink it through out the match so need a bottle top on it. It's a pathetic policy regardless of other grounds and venues doing it. I'll continue to smuggle in bottle caps and PB can do not a thing about it.
And I'm guessing you're not one of the morons that would lob a bottle of fizz onto the pitch which has been seen happening more and more.