Lab glass is a type of specialized glassware used in laboratories for various purposes. The term 'lab glass' encompasses three different types of glassware: ampules, pyrex, and vials. Ampules are small sealed glass containers with a narrow neck, typically used to store and transport small amounts of liquid or gas. Pyrex is a type of borosilicate glass that is highly resistant to thermal shock and chemical attack, making it ideal for laboratory use. Vials are small cylindrical containers with a lid, often used to store and transport samples. All three types of lab glass are essential components of any laboratory.