A 90mm glass Petri dish is a laboratory tool for culturing microorganisms or conducting biological experiments. Made of glass, it offers heat and chemical resistance. Glass Petri dishes are commonly used in microbiology and cell culture applications due to their non-reactivity and ability to withstand high temperatures. They can be sterilized and reused. To use, a growth medium is poured into the dish, and microorganisms are inoculated for observation. Proper handling and aseptic techniques are crucial. After use, the dish can be cleaned, sterilized, and reused or disposed of. Glass Petri dishes provide a durable platform for studying microorganisms in labs.