...I was so frusturated about that one last night, and I'm kind of still not sure about it.
And as for the drink...
Maybe Dylan leads a secret vampire life at night, under cover of darkness. And everything about him is just an act...he's actually very clever, and plays dumb to avoid detection. And his blond mop of hair is just a wig, and underneath it's all black and slick.
And that's what REALLY happened to some of the characters that haven't been seen for a while!
Or, (and this is a long shot) maybe it's a bottle of beer with a red label.