Radium Trink Kur Bottle (ca. 1920)
The label on this empty bottle reads "Radium Trink Kur." You don't need to be German to know that this means radium drink cure.
I am guessing that it dates from 1910 to 1930, although it might be of more recent vintage. It probably comes from Germany, however other German-speaking countries (e.g., Austria) are possibilities.
That no residual radioactivity is detectable suggests that the contents, possibly water from a "health spring," were not "spiked" with radium.
Size: ca. 10" tall (25 cm)
I wish I had more useful information.