Lab glasses, also known as safety glasses, are protective eyewear designed to shield the eyes from hazardous materials and debris. They are typically made of a strong, shatter-resistant material such as polycarbonate and are often used in laboratories and other industrial settings. Vials, which have five letters, are small containers used to store and transport liquids, powders, and other substances. They are usually made of glass or plastic and come in a variety of shapes and sizes.