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Title: NOT STERILE!
Review: I just bought a sleeve to use to create cultures of a few different edible mushrooms and to isolate a yeast strain that I use in brewing. I used 10 other Pyrex petri dishes at the same time as a control as well as to have enough dishes for what I was doing. Two days after pouring the agar and all 20 of the plastic dishes have heavy contaminate while the ten Pyrex dishes are perfectly fine. I've been doing this for years and my sterile technique nor my flowhood is not to blame, these petri dishes were taped shut in a previously open bag and had holes all over the bag.These are far from sterile, buyer beware!
