How long do I have?

So, my wife came home from a company dinner with a few bottles of wine that were purchased because they were below the minimum food/beverage charge. The corks were pulled and immediately reinserted. Avoiding the usual bitching here about certain wines, they have a total value of $1500 (think big Napa Bordeaux blends) so given they are free I’m happy to enjoy, but don’t want to “rage” like my younger, dumber self. So, the question is how long do I have before they lose all character?