Giving Guniu-Choli is a tradition practiced for a long time now, but has been commercialized these days. In past, parents (especially mother) used to give a set of traditional clothes (sari or Guniu-Cholo) to their daughters before they reached the age of puberty. By doing this, the girl is spared from the trouble of staying locked in a room where she could neither see any male members nor a single ray of sun when she reaches her first menstruation cycle (as is the traditional practices, still prevalent in rural areas where the girls are locked in the cow shed). It is usually given on special occasions like pujas or Dashain or on an auspicious day. The girl is given a set of tradition clothes that include Guniu-Choli, fariya and patuka, along with accessories like lachi and sir-bandi. The other members of the family then, put tika on their forehead and bless them with gifts and cash.
Some of the photos of Guniu-Choli of two girls are posted below.