The Storage Hack To Save Opened Red Wine - Chowhound

When you decant wine into a smaller bottle, you're not going to totally prevent it from being exposed to oxygen. This isn't really a problem: The goal here is to reduce the exposure to oxygen, not to completely prevent it. So, a little bit of air at the top of a half-bottle is okay, since it's not enough to cause substantial oxidation (as compared to the much larger pocket of air at the top of a half-full big…