So a few days ago I purchased a growler from a local NYC shop that I frequent and often spend a decent amount of money at per transaction. The gentleman behind the counter showed me a new kind of growler that was plastic(like the water bags at concerts) and assured me it was safe from oxidation. I purcahsed both the bag and the growler from said man, whom I've come to trust in mutal beer respect, however when I opened the growler today it was clearly oxidized and wet papery. Can I return it? I poured a single glass and re-screwed it. Should I complain and boycott? I'm a good customer of theirs and I know its not proper etiquette to return something like this but I feel kind of slighted.