If you find too much humidity the wine can grow mold. They knew that to keep wine tasting the best, it should be stored in a cool, dark and somewhat humid put in. Most 750 ml bottles are about 11-12 inches high; the diameters generally are about 3-3.5 inches, so size is important. http://Bbs.Xinhaolian.com/home.php?mod=space&uid=3947924