Does anyone use the 5-Gallon "Culligan" type water bottles for a secondary (or primary)? I know that they are more permeable to oxygen, more prone to scratching, etc, but I have a friend that will give me 4 or 5 if I want them, and it seems like they would work with proper stopper ant airlock. After a couple of uses, I could give them back & switch out for new ones.