I thought, until recently, that whiskey could be stored for many years in an opened bottle without negative effects. I just found out that is true to a certain extent but if the bottle is less than 1/2 full the whiskey will start to deteriorate due to too much air.

I tend to like to drink a lot of different whiskies over time instead of opening a bottle and concentrating on that.

I was also told a remedy of this situation is Vacu Vin Pump.
Does anyone use this? Does it work well with whiskey?