A lot of people I know say factory sealed. Maybe these reactions were filmed a while back when this effect was just called a Coin Through Bottle, maybe they adapted the name from that guy to name the effect.
brian.
I agree that person saying it was "factory sealed" seemed weird but then again it could've just been the patter that Justin used. Justin couldve really pushed the fact that it was "factory sealed" that it stuck with the spectator. I live in NYC with you and I know absolutely NO ONE that says "factory sealed."