It’s best not to store open bottles on a wine rack, as the wine’s exposure to air can quickly degrade its quality. For open bottles, use a wine stopper and refrigerate to maintain freshness, as racks are ideal for long-term storage of unopened bottles. Racks keep corks moist by positioning bottles horizontally, which doesn’t benefit opened bottles that no longer need this protection. An open bottle stored horizontally might leak. If you frequently store opened bottles, consider a dedicated wine cooler or sealed container to ensure the wine’s flavor and aroma stay preserved for a few days longer.