Simple as that, adding the WineSerializer as a field solved it.
class BottleSerializer(serializers.HyperlinkedModelSerializer):
wine = WineSerializer(source="wine")
class Meta:
model = Bottle
fields = ('url', 'wine', 'user', 'date_rated', 'rating', 'comment', 'get_more')
with:
class WineSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = Wine
fields = ('id', 'url', 'color', 'country', 'region', 'appellation')
Thanks for the help @mariodev 🙂