How glass bottles are made

Glass bottles are used everywhere. Do you know how glass bottles are made? In fact, it is made from sand, limestone, and soda ash. Too strange, right? These three materials are mixed together in the right proportions. This mixture is heated strongly in a furnace, and sometimes broken glass are added. Then it is shaped into bottles in the mould. Next the bottles are reheated and cooled to strengthen the glass. Now, Glass bottles are produced and ready to to use!