What are /r/girls' favorite Products & Services?

From 3.5 billion Reddit comments

The Group by Mary McCarthy is a great book about a group of post college women. Despite being written in the 30s, the arguments about birth control, God, and the meaning of a painting are familiar and funny.

Iirc, all the girls went to Vassar, and then moved on to NYC. This book traces their lives in the following decade, with liberal amount of college reminiscence. So yeah, Girls-like.