There is a tendency to utilize underground space for the less ornamental purposes of civilization; there is the Metropolitan Railway in London, for instance, there are new electric railways, there are subways, there are underground workrooms and restaurants, and they increase and multiply.
Polystyrene can be naturally transparent, but can be colored with colorants. Uses include protective packaging (such as packing peanuts and CD and DVD cases), containers (such as clamshells), lids, bottles, trays, tumblers, and disposable cutlery.
packaging in Retail (pÃ¦kÉªdÊÉªÅ) Packaging is any outer layer, such as a carton or tray made of plastic or cardboard, used to protect products from damage and often printed with information about the product. This barcode must not have any hidden security numbers and should be placed on the bottom of the outer packaging of each unit.