I got pulled and searched on Friday last year going from Houx towards our Friday extravaganza. I had cans but the guard wasn't having any of it. Of course, it could have been the axe, Mr T's mace, and crucifix tattoo on my cheek that tipped him over.
There were about six cans in the rucksack, so I drank 2 in front of him, and that seemed to do it.
I suspect he was a bit bored.
Aricus