I'm hoping to stop by this market tomorrow who purchased two of their own barrels of Elijah Craig 12. Of the two, one had a 50% evaporation vs 20% of the other one. From what I've been told, the 50% was stored near a window in the warehouse which causes a ton more evaporation. The yield difference was 144 bottles versus 200ish. Suppose to be awesome especially when you consider it's still sub $30.