Yes, I admit this was rather bizarre and a really extreme example. It tasted very bitter and acidic. I actually had to pour out the glass.Originally Posted by jeff
My general position is that a bottle of bourbon will change one it is opened and as the level goes down. I often find that the first pour is outstanding, then it is not quite as good, and then as you get 1/3 to 1/2 into the bottle it gets more complex and flavorful again. It would appear that some breathing or oxidation can be good, but too much is bad. I find as the bottle gets low, even using nitrogen, the quality fades again. Once I get to around 1/4 bottle I try to finish it off within a week. I have heard even people that do not believe in presevative admit that once the level gets low they kill the bottle quickly or pour it into a vatting bottle to keep the fluid level high.
I too have been VERY perplexed by the radical difference of opinions. Some people keep bottles open for years and report no degradation. Others claim a bottle will change in a negative way in a month or 2. I would like to pick up 2 bottles of AAA or similar and do a side by side experiment. One bottle will get Nitrogen and one won't. I'll have a blind pour out of each once per month and see if I can tell the difference or not.