These petri dishes are designed for reliable and efficient use in the science laboratory. The disposable polystyrene dishes feature top and bottom edges that are squared off, offering a comfortable and secure grip for handling. The flat bottom plate ensures that the medium spreads evenly over the entire dish, providing consistent results during experiments. Additionally, the lid can be placed upside down on the dish to effectively close off the environment from outside contaminants, maintaining the integrity of the samples. In an economical 10/pack, these 100mm X 15mm petri dishes are the perfect choice for a wide range of scientific applications.