LabniquePolystyrene Petri Dish with Vented Lid, 90mm, Sterile (Case of 500)

These are the standard dish that vents well and does the job you want them to do.

I've bought these petri dishes in particular several times thus far as they seem to be a good deal, and of decent quality.

I accepted broken plates as a loss but every plate was contaminated. Same agar used with 2 different brand of plates. Everyone of these were contaminated.

Good basic petris

sturdy and exactly what I was expecting - i wouldn't mind it being a bit cheaper

Good product

I lightly squeezed the package and air was escaping that tells me these are not sterile also had a few with some cracks in them. The point of disposable petri dishes is so you don't have to autoclave them so these are completely useless now. I don't want to waste my time and money with contaminated cultures.

30 minutes in an instant pot will inform you that they are not, in fact, reusable...