Stock Photo - PRODUCTION - 02 February 2023, Baden-Württemberg, Stuttgart: Michael Feil (l) and Dieter Obertautsch (r), the inventors and developers of a butter pretzel filling machine, stand with their development in a bakery store in the Markthalle. Pretzels can be automatically filled with butter. (to dpa: ""Tinkerers want to revolutionize butter pretzels"") Photo: Bernd Weißbrod/dpa. - Stuttgart/Baden-Württemberg/Germany

Stock Photo: PRODUCTION - 02 February 2023, Baden-Württemberg, Stuttgart: Michael Feil (l) and Dieter Obertautsch (r), the inventors and developers of a butter pretzel.

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