Container glass is a type of glass for the prouction 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 fiberglass (used for thermal insulation and optical communication). Most container glass is soda-lime glass, produced by blowing and pressing techniques, while some laboratory glassware is made from borosilicate glass. Container glasses include the following: