how long is an open bottle of bourbon good for?

[WhiskeyRiver]

A couple of hours with good friends.

[jburlowski]

An unfinished glass of whiskey, if it doesn't all evaporate, will be undrinkable the next day.

I'm amazed that you know this... Did you like leave an unfinished glass?? (horrors!)

[The Boozer]

By "open bottle" people usually mean a partially-consumed bottle, but one with the top sealed by a cork or screw cap. What you're really talking about is open, as in exposed to the air, in this case not entirely, but you say the flask "wasn't sealed completely."

Obviously, I don't know the extent of the partial seal, but whiskey exposed to the air will deteriorate pretty quickly. How fast? An unfinished glass of whiskey, if it doesn't all evaporate, will be undrinkable the next day.

Want to make a bet!! It made not be as good as the night before but it certainly is drinkable. Never waste bourbon. It will definitely "wake you in the morning". Usually I have poured myself another glass, which I realy don't need, and end up falling asleep before I get to finish that nightcap.
TJ

[Slob]

Hooray for thread necromancy. I was getting worried about a few of my bottles. This thread calmed my nerves.