What did helana Rubenstein invent?

Answer 1

She invented mascara with a wand type applicator as we know it today. Prior to that, mascara made in a hard cake form which was applied by using a small, wet, toothbrush type brush.

Decades after the mascara wand was invented, a tiny toothpaste type tube of mascara was introduced which was squeezed onto the small toothbrush type brush. But it did not do well because women were always left with a dirty brush and often lost the cap to close the tube. Hence today we still use the tube type that Helena Rubenstein invented.