title_body: Is a bottle of Sake that was open for roughly two years safe to drink?
upvoted_answer: It's safe to drink. I don't think you want to drink it or cook with it. The rule of thumb if it tastes bad, why would you cook with it? The chances that it actually tastes good at this point are about zero. You could do a taste test if you really want, but it won't hurt you (unless you drink too much and then you'll get a hangover)