[Pauses awkwardly, before rapidly relating a complicated origin story]
A Kir is a French cocktail, a glass of white wine with a bit of crème de cassis (blackcurrant liqueur). There are a number of common variations. The Kir Royal, for instance, uses Champagne instead of still white wine. The Kir Breton uses hard cider. So this most recent invention was inspired by the Kir Breton.