This one looked interesting, too: http://pubs.acs.org/doi/abs/10.1021/jf9023257 "Impact of Oxygen Dissolved at Bottling and Transmitted through Closures on the Composition and Sensory Properties of a Sauvignon Blanc Wine during Bottle Storage" It was interesting to see that the Saranex 38 liners have polyethylene as the wine-facing layer while the Saran-Tin liners have polyvinylidene chloride (over the tin) in contact with the wine. (It seems like polyethylene would have less chance of degrading into something unpleasant over the long term than would polyvinylidene chloride, but it is also more oxygen permeable. Though in the dark without much oxygen, they're both probably fine for a long long time)