Why did you double ziploc the canisters before freezing? Did you wish to keep the humidity inside these bags? Ziploc in the freezer is to keep the humidity within the food, which is exactly the opposite you want with the film. I use simple plastic bags, even perforated, in order to allow the freezer to dry the air inside. Would I have paper bags, I would use them instead. Moreover, with paper bags you can go so much anal you want…