Hello nieriker, thank you very much for your inquiry. Many manufacturers put this symbol on their non-alcoholic beverages so as not to accustom minors to their taste, or encourage them to consume alcoholic beverages afterwards. This has nothing to do with quinine. This is a third-party product, so we have only limited influence over the label. Should you have any further questions, please contact our manufacturer directly: https://www.suze.com/fr/nous-contacter/. Best regards, Chloe