A petri dish is a circular glass or plastic vessel used to contain liquid culture medium or solid agar culture medium for cell culture. It consists of a base and a lid and is a chemical equipment used for bacterial culture. The main material is glass or plastic.

Petri dishes are fragile and easily broken, so they should be handled with care and gently placed during cleaning and handling. It is best to clean the used petri dishes promptly and store them in a safe and fixed location to prevent damage or breakage.