The spirit in your cask available for bottling after its maturation period will vary depending on the 'Angel's Share' – the natural evaporation and loss of spirit that occurs over time. Ordinarily, you'd expect to lose approximately 2% of the liquid inside the cask each year due to evaporation, but certain casks experience greater or lesser loss over time. All casks will be reviewed on a regular basis to ensure there are no excessive losses. Maturation period, bottle size and bottling strength will all have an impact on the number bottles remaining at the end of the period of maturation. As an example, you'd expect a 200 litre cask to yield approximately 300x70cl bottles at 46% ABV after 10 years of maturation. Please note, any quoted numbers are approximates only, your cask may result in more or fewer bottles.