A petri dish is used to culture different types of cells, including bacteria and molds. It often contains a nutritional medium on which the cells can grow. A petri dish is a flat, shallow dish made of glass or plastic with a suitable lid.
 
They are round shallow transparent dishes made of glass or plastic. They come with a lid that rests loosely at the top and sides. The (borosilicate) glass types are made especially to withstand sterilization methods and for re use.
 
Cell Culture (Petri dishes are also used for cell cultivation of isolated eukaryotic cells, such as in immunodiffusion experiments, on solid agar or liquid medium.) Evaporating. Drying. Sample Storage and Display.