Container glass Container glass Container glass is a type of glass for the production of glass containers, such as bottles, jars, drinkware, and bowls. Container glass stands in contrast to "flat glass" (used for windows, glass doors, transparent walls, windshields) and "glass fiber" (used for thermal insulation, in fiberglass composites, and optical communication). Container glass has a lower magnesium oxide and sodium oxide content than flat glass, and a higher Silica, Calcium oxide, and Aluminum oxide content. Its higher content of water-insoluble oxides imparts slightly higher chemical durability against water, which is required for storage of beverages and food. Most container glass
Type C6 ship Type C6 ship The Type C6 ship is a United States Maritime Administration (MARAD) designation for a container ship developed during the transition years from moving goods by breakbulk cargo to containerization. The Type C4 ships "Mariner" class, arranged with its house/engine-room in the center vessel with cargo hatches at 4 forward and 2 aft, was very successful. Eleven of these "Mariner" ships were converted into Type C6 container ships, and eight vessels were new built. As of September 2018 only three C6 ships, the converted C4s, are extant. All three are crane ships in the National Defense Reserve Fleet.