Cup attended from 1915 to 1918 and graduated from high school in Munich until 1919 language studies at the University of Heidelberg. In 1919, she joined the Communist Party. She worked at the Delphi Verlag Munich, at Ullsteinhaus and 1921 for the newspaper The Red Flag in Berlin. 1922-1923 she was head of the Communist Party Ms Berlin- Neukölln. 1924 to 1926, she led the women's magazine she founded The worker was then and until 1933 editor and editor of the New German publisher. In addition, it was from 1932 to 1933 editor of the Workers Illustrated Newspaper.
1933-1934 she lived in Vienna and was then to 1936 employee of the publishing house Editions du Carrefour in Paris. Here she also met her future husband Johannes R. Becher know. In 1936, she was the first documentary on the persecution of Jews in Nazi Germany under the title "The Yellow spot" out. By 1945 they then lived as a translator of the state publishing house in Moscow and worked beside for the magazine " International Literature", the German department of the Moscow Radio and the National Committee for a Free Germany.
After her return to Germany she joined the SED. She was from 1945 to 1950 editor of the New Berlin magazines (NBI ). After the death of her husband Johannes R. Becher 1958, she headed the archive named after him at the Academy of Arts.
Cup in 1961 and 1971 awarded the Patriotic Order of Merit, in 1969 with the Banner of Labor, and in 1976 with the honor Clasp to the Patriotic Order of Merit.
- Red signals. Poems and songs (eds ). ; Berlin 1931
- The yellow spot ( ed.); 1936
- L. mug, G. Prokop: Johannes R. Becher. Picture chronicle of his life; Berlin 1963