A bag may be closable by a zipper, snap fastener, etc., or straightforwardly by folding (e.g. in the case of a daily bag). Sometimes a money duffel or travel bag has-been a lock. Sachets may be fabric bags that are filled with pot pourri and tied off with ribbons.

Cheap disposable paper bags and plastic shopping bags are very conventional in the retail exchange as a convenience for shoppers, and are often supplied by the shop for free or for a microscopic Tote Bags fee. Customers may also take their own shopping bags to the shop.