Although the brittle, silicate glass is extremely durable, there are many examples of glass fragments from early cultures in which glass is made. Since the glass can be poured into any shape, and because it is a sterile product, it has traditionally been used for dishes: bowls, vases, bottles, jars and glasses for drinking. In most of its solid forms, it is also used as a paper, paper, and bead press. When extruded as glass fibers and pulses like glass wool on such airborne air, it becomes thermal insulation material, and when these glass fibers are incorporated into organic polymeric plastics, they are the key structural reinforcement component of fiberglass composite materials.
In the sciences, the term glass is often defined in the broader sense, so that it includes any solid material that possesses a non-crystalline (i.e., amorphous) structure on the atomic scale and which exhibits a glass transition during heating to a liquid state.  Therefore, porcelain and many polymer thermoplastics, often found in daily use, are also physical glass. Metal alloys, ionic melt, aqueous solutions, and polymers. In many forms of application (bottles, glasses), polymeric glass (acrylic glass, polycarbonate, polyethylene terephthalate) are more convenient alternatives to traditional silicon glass