Wondering if the bottle of wine I have is still good or not
If you want to make sure your wine is still good without opening the bottle (wine, vinegar or broth), there are some things you can check. This doesn't give you 100% guarantee that the wine is actually any good.


Did the bottle lay horizontally (good) or was it standing up (bad). The wine must be in contact with the cork to hydrate it. This way the seal stays intact and the wine doesn't spoil.
How 'aged' was the wine? Normally a young wine will last about one year (maybe two in the fridge), a reserve or great reserve can last longer. Some wines will mature for 25 years or more.
Check the seal. If it's in good state (no 'dirty' spots), that's good.
Check the cork (without opening the seal). If the cork is pushing the seal out, then your wine may have suffered from heat (the air in the bottle pushes the cork out). This may cause your wine to taste of cork (broth).
Remove the seal and check the cork. If the cork is clean, that's good. If it has red spots (see point 4). If it looks dry... you may have a nice vinegar.
Substances floating in the wine doesn't mean the wine is bad, but you'll need to decant the wine carefully.


But anyway, open the bottle soon. Waiting any longer won't make the wine any better.