Personally I dont like bisleri a lot. it is not any better then alternatives available in the market. I had worked in the company itself and I didnt find something remarkable. plus many other companies give a lot better packaging in same price. and they charge too much just for normal water. for marketing they add some minerals in that but that is not gonna make u super healthy or something.
18 rupees for one liter water is too much for a middle class person and sometimes shopkeepers charge 2 rupees extra for cooling. it is okay if u r out of town or at some event etc but for daily use in college or office I would say carrying own bottle is best