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Since 2012, tap water has been offered alongside branded water in all types of catering establishments with the WfW CLASSIC concept and charged at prices chosen by the establishment itself. Since 2016, more and more catering establishments have been using the WfW GREEN concept: they serve only tap water, do not use bottled water and transfer part of the water turnover to WfW. Since 2022, WfW GREEN HOTEL serve drinking water from the most local source in their establishments. The contributions of gastronomy partners flow 100% into WfW's water, hygiene and education programmes.