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.
Microfoam protective packaging material incorporates 50,000 closed cells per cubic inch for superb cushioning, void fill, thermal, vapor transmission interleaving, surface protection and insulation. Microfoam sheet foam is a versatile material with unlimited applications across a wide range of industries. Available in sheets, rolls and laminated forms, microfoam sheet foam is the only low density polypropylene sheet foam product on the market. Micro Foam is the only low density polypropylene sheet foam on the market.