At Meximed we offer a wide variety of petri dishes in either glass or plastic. They are essential lab materials used for growing and studying cultures. Our flat, clear petri dishes will withstand repeated sterilization (wet or dry). The edges are beaded to provide greater mechanical strength. The bead also provides a means to equally space the sidewalls of the bottom and cover, thereby reducing the capillary action of the condensed moisture on the sides. They are not affected chemically or thermally by any of the methods commonly employed in laboratories where sterilization is routinely used.