Round embroided patch, slightly over 8 cm in size, from Whisky Bar in Turku, a well-known venue for afterparties of festivals such as Hammer Open Air, or Turku Saatanalle, and also for ticket exchange and such functions.
They gave these to people who purchased the house shot of whisky sour... I guess they're also sold separately? Three versions, but I only noticed two. Maybe next time. In my heart this counts as Turku Saatanalle XI festival souvenir.