The most popular drink in Brittany is cider, fermented apple-juice. The Rance valley has reputation to produce good ones. There is a cider/apple museum in a neighbor village of Saint-Suliac, at Pleudihen sur Rance.
Another traditional drink in Brittany is the 'Chouchen', a licqueur. The recipe is .... a secret. And of course the famous Calvados.