Promoting the production of wine specialties from interspecific grape varieties and grape varieties from natural farming in mutual self-help; accompanying and supporting producers and winemakers in the management of their vineyards and in achieving the corresponding quality standards for grapes; acquiring and managing own vineyard plots for interspecific grape varieties; setting up and operating a cellar for storing and selling wine specialties; marketing wine specialties from interspecific grape varieties and natural farming; close cooperation with the umbrella organization PIWI-Produzenten Schweiz and its sections; in addition, other tasks that serve the purpose of the cooperative can be taken over.