When I prepare homestyle comfort dishes for family meals, I frequently use leftover cooking wine. Last week, while making a traditional braised stew, I placed an open bottle in the refrigerator. To be completely honest, I am not entirely certain about the exact number of days it remains fresh. From my limited experience, the flavor begins to alter slightly after a couple of days, but I always rely on a quick smell test rather than a definitive schedule because I lack precise confirmation on the timeline.