There is a bottle of Williams Bros Fraoch Heather Ale behind door number 13. It might sound light and floral but it is a mighty 5% ABV in a 330ml bottle and is described as:
Scotland's Original craft beer, brewed by Williams Bros from a 4000 year old recipe. Leann Fraoch or Heather Ale is the oldest style of ale still in production today. A light amber ale with a floral, peaty aroma, full malty body and spicy herbal finish.