How Long Sake Will Still Taste Good After Opening - Chowhound

Trust us, when your sake goes bad, you'll notice. The most glaring indicator is a sour, vinegar-like aroma emanating from the bottle when you uncap it. Instead of its usual clear, spring water-like hue, the sake may adopt an amber color akin to lager beer, with a cloudy appearance — a clear sign that oxidation has taken its toll on the drink. However, there are exceptions to this visual rule. For instance, koshu…