There's no technically to it.

You flash a beer in front of an LEO and you're in for a ticket at the minimum.

Something else to note. Don't get caught with them simply in your posession if you go to LBL. No alcohol allowed and those are federal charges. The feds don't play over there and have never heard of a warning, either. They will invade your campsite in a New York minute and ticket everyone there whether you are actually drinking or not.