Paper or Plastic is a phrase used to ask customers at the checkout counter of a store which type of BAG they would like to use for their purchases. The term 'BAG' is a 3 letter word that is used to refer to either paper or plastic bags. Paper bags are made from recycled paper and are biodegradable, while plastic bags are made from petroleum products and are not biodegradable. Both types of bags have their advantages and disadvantages, so it is up to the customer to decide which type of BAG they would like to use.