Annealed glass, sometimes called standard glass, is slowly cooled to relieve any internal stresses. It can then be cut, shaped, and modified. When annealed glass breaks it usually does so in long, sharp pieces. It is generally used when cost is more important than safety or strength. Tempered glass is several times stronger than annealed glass, but when it does break it creates many small pieces that decrease the likelihood of injury. Tempered glass is required in and around doorways, along the floor, and in areas where falls are more likely such as baths and showers. Tempered glass is also used in vehicles except for the windshield.