– The name is inspired by courageous young women from Lublin who were imprisoned at Ravensbrueck Concetration Camp who were victims of deadly medical experiments. They bravely intertwined secret notes in urine telling the truth of their situation in what seemingly looked like a simple letter home. In order for the families to find the secret messages they would have to heat up the letters to find the notes revealing the grave truth of their situation. The letters ultimately made the truth of their situation public and are important evidence of the atrocities committed in the Holocaust.