For Wertheim tourists and visitors to the museum, Frank Krause makes artistic bottles that can be filled with oil and vinegar at the same time. In addition to his work at the Wertheim Glass Museum, the glassblower runs his own glass workshop and was a specialist teacher at the Wertheim Glass College. He sells his glass objects through fellow glassblowers on the river cruise ships that moor on the Main near Wertheim: "The bottles sell particularly well there as souvenirs," the glass artist reports.