While for most other aged spirits, the Angels Share is about a 2% loss of the total volume per year, due to the warmer environments in which Tequila is made, these barrels often lose closer to 5-10%! 

The quick evaporation rates in aging tequila barrels places a very high importance on the blenders of the final product. A master blender must be very careful to use just enough from each barrel to keep the taste uniform in the product that goes to market.