Paper bag is a preformed container made of paper, usually with an opening on one side. It can be one layer of paper or multiple layers of paper and other flexible materials. 

paper bag is used for packaging and/or carrying items.Paper shopping bags, brown paper bag, grocery bags, paper bread bag and other light duty bags have a single layer of paper. A variety of constructions and designs are available. Many are printed with the names of stores and brands. Paper bags are not water proof. Types of paper bag are: laminated, twisted, flat tap. The laminated bag, whilst not being totally waterproof has a laminate that protects the outside to some degree.

A reusable paper bag, the perfect bag. The perfect option for the environmentally conscience and responsible shopper. It's a heavy duty and durable paper bag that can be used over and over. Some paper bags are made with recycled material and printed with logos. These paper bags are walking advertisement from their local boutique stores, pet stores, flower stores, grocery stores and spas. I don't know any lady that would throw away a shopping bag because it has a unique usage for carrying some type of item. Some ladies just like to collect paper bags and never reuse them. Just go into one of your lady friend's homes and you will find a stash of colorful paper bags just waiting to be discovered and reused.