Yes, travelers receive free drinks and alcoholic beverages when flying the most premium first-class cabins to travel to Barcelona or any other long-haul international flight. In these premium cabins, travelers receive complimentary wine, beer, and spirits, juices, coffee, water, etc. Moreover, after getting a First Class ticket to Barcelona, travelers are granted access to airport lounges where food and drinks are also complimentary before they board. To know more about benefits and the booking process, read the blog mentioned by Fares First Class.