Pinched Bottom bags are a simplified variant of grocery bags that expand on the sides when filled, but does not have a gusset at the bottom. They are generally large in size and are used for storing food materials. Pinched Bottom bags made from plastic are used to display items at the point of sale. Paper bags are used as grocery bags.
Square bottom bags are gusseted at the sides as well as the bottom, thereby increasing the inner space. They constructed from a wide range of materials depending on the requirements. Paper bags are generally used as grocery bags whereas plastic bags or metalized bags are used as retail packaging.